Check Valves
Check valves are mechanical devices designed to allow fluid—whether liquid or gas—to flow in only one direction, preventing backflow that can damage equipment or disrupt system performance. Commonly used in industrial, plumbing, and MRO (maintenance, repair, and operations) systems, they automatically open with forward flow and close when flow reverses. Available in various types like swing, ball, and inline designs, check valves are essential for ensuring system integrity, protecting pumps and compressors, and maintaining operational safety.
Types of Check Valves We Offer:
- Swing Check Valves – Ideal for irrigation and low-pressure systems
- Ball Check Valves – Reliable for wastewater and slurry applications
- Piston Check Valves – Designed for precise flow control in hydraulic systems
We partner with leading manufacturers to provide top-quality materials and engineering in every check valve we supply. Browse our extensive selection and find the perfect check valve for your needs. Order online today or contact our experts for assistance!
Related categories: Valves | Needle Valves | Control Valves | Cryogenic Valves | Lined Valves
Filter
Search: ball
Filter
Search: ball
271 items
content loaded
Y-Ball Check Valve - EPDM (45BY)
$433.33
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
Y-Ball Check Valve - EPDM (45BY)
$899.98
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
Y-Ball Check Valve - VITON (45BY)
$382.66
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
Y-Ball Check Valve - VITON (45BY)
$489.33
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
Y-Ball Check Valve - VITON (45BY)
$703.99
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
Y-Ball Check Valve - VITON (45BY)
$998.65
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
Y-Ball Check Valve - EPDM (45BY)
$638.66
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$4,542.30$12,328.78
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$5,306.52$14,403.02
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$6,496.58$17,633.09
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$3,745.81$10,166.93
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$5,011.41$14,426.71
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$6,229.59$16,908.44
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$13,756.19$37,337.22
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$7,459.97$20,247.94
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$6,265.19$17,005.06
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$10,112.40$27,447.20
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$10,928.49$29,662.25
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$5,502.14$14,933.99
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$4,809.80$13,993.57
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$13,026.78$35,357.46
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$4,542.30$12,328.78
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$4,328.06$12,328.78
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$4,393.11$11,923.83
Available for Purchase
Subject to factory lead times
Y-Ball Check Valve - EPDM (45BY)
$433.33
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
Y-Ball Check Valve - EPDM (45BY)
$899.98
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
Y-Ball Check Valve - VITON (45BY)
$382.66
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
Y-Ball Check Valve - VITON (45BY)
$489.33
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
Y-Ball Check Valve - VITON (45BY)
$703.99
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
Y-Ball Check Valve - VITON (45BY)
$998.65
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
Y-Ball Check Valve - EPDM (45BY)
$638.66
Should ship between 07 Nov and 09 Nov
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$4,542.30$12,328.78
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$5,306.52$14,403.02
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$6,496.58$17,633.09
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$3,745.81$10,166.93
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$5,011.41$14,426.71
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$6,229.59$16,908.44
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$13,756.19$37,337.22
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$7,459.97$20,247.94
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$6,265.19$17,005.06
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$10,112.40$27,447.20
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$10,928.49$29,662.25
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$5,502.14$14,933.99
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$4,809.80$13,993.57
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$13,026.78$35,357.46
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$4,542.30$12,328.78
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$4,328.06$12,328.78
Available for Purchase
Subject to factory lead times
The Apollo® Model DCDA4SG Double Check Detector Assembly is designed to prevent contamination of the potable water supply due to back-siphonageor backpressure from substances that are non-health hazards. The device consists of a mainline double check valve with a by-pass line. The by-pass consistsof a water meter and an approved Apollo® double-check valve with Apollo® ball valves as shutoffs. The by-pass serves to measure water use of up to 3 gpm.Grooved connections on an epoxy-coated ductile iron body allow for easy connection to butterfly valves or gate valves. Note: Model DCDA4SG replacesModel 4S-600 (also known as Model DCDA) in all sizes except 10”. lightweightshort lay lengthlow pressure lossmodular check valvesindividual access to check valvescorrosion resistant epoxy-coated ductile iron bodyUS patents: #5,711,341 and #6,343,618assembled and tested in the USA
$4,393.11$11,923.83
Available for Purchase
Subject to factory lead times
FAQS
- A check valve is a one way valve that allows fluid to flow in one direction only and automatically prevents backflow in a piping system.
- A check valve opens when fluid flows in the correct direction and closes when flow stops or reverses. The closing mechanism may use a disc, ball, flap, or spring depending on the valve design.
- Check valves are used to protect pumps, compressors, piping, and equipment from damage caused by reverse flow. They are commonly installed on pump discharge lines.
- Swing check valves rely on gravity and flow to open and close, while spring loaded check valves use a spring to close quickly and reduce water hammer.
- Check valves are made from materials such as cast iron, ductile iron, stainless steel, brass, bronze, PVC, CPVC, and other plastics depending on application needs.