Check Valves - Apollo 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
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The 4ANLF62EG9 from Apollo is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 8" (2 x Groove). This product serves professionals across fire protection, marine, and plumbing sectors. Apollo products are trusted by engineers and specifiers worldwide. This product meets relevant NSF and UL standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF62GG3 from Apollo is a Type 2 Double Check Detector Assembly. Typical applications span plumbing, fire protection, and industrial processing environments. Backed by Apollo's commitment to quality, the 4ANLF62GG3 is built to perform under real-world conditions. This product meets relevant ASME and UL standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62AG3 from Apollo is a Type 2 Double Check Detector Assembly. It is commonly found in plumbing, commercial mechanical systems, and marine applications. Apollo Valves is recognized globally for engineering products that meet strict performance standards. This product meets relevant ASME and FM standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62AG8 is a Type 2 Double Check Detector Assembly. It is commonly found in HVAC, oil and gas, and commercial mechanical systems applications. Apollo products are trusted by engineers and specifiers worldwide. It is designed to comply with applicable ASME and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62AG7 is a Type 2 Double Check Detector Assembly. This product serves professionals across plumbing, HVAC, and fire protection sectors. The 4ANLF62AG7 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62CG3 is a Type 2 Double Check Detector Assembly. This product serves professionals across commercial mechanical systems, fire protection, and oil and gas sectors. Apollo products are trusted by engineers and specifiers worldwide.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF62CG8 is a Type 2 Double Check Detector Assembly. Typical applications span industrial processing, commercial mechanical systems, and HVAC environments. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. This product meets relevant UL and NSF standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62CG7 from Apollo is a Type 2 Double Check Detector Assembly. It is commonly found in plumbing, industrial processing, and fire protection applications. Apollo products are trusted by engineers and specifiers worldwide. This product meets relevant ASME and NSF standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62EG3 is a Type 2 Double Check Detector Assembly. It is commonly found in oil and gas, fire protection, and marine applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF62EG8 from Apollo is a Type 2 Double Check Detector Assembly. It is commonly found in fire protection, industrial processing, and commercial mechanical systems applications. Apollo Valves is recognized globally for engineering products that meet strict performance standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF62EG7 from Apollo is a Type 2 Double Check Detector Assembly. Typical applications span commercial mechanical systems, oil and gas, and fire protection environments. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable UL and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62AG4 from Apollo is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 4" (Flange x Groove). This product serves professionals across HVAC, fire protection, and industrial processing sectors. Apollo products are trusted by engineers and specifiers worldwide.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62CG4 from Apollo is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 6" (Flange x Groove). It is commonly found in HVAC, industrial processing, and marine applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62EG4 is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 8" (Flange x Groove) per the manufacturer's specifications. Typical applications span commercial mechanical systems, oil and gas, and industrial processing environments. Backed by Apollo's commitment to quality, the 4ANLF62EG4 is built to perform under real-world conditions. It is designed to comply with applicable ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62AG6 is a Type 2 Double Check Detector Assembly. Typical applications span fire protection, marine, and commercial mechanical systems environments. Backed by Apollo's commitment to quality, the 4ANLF62AG6 is built to perform under real-world conditions. It is designed to comply with applicable ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62AG10 is a Type 2 Double Check Detector Assembly. It is commonly found in oil and gas, fire protection, and commercial mechanical systems applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62CG6 from Apollo is a Type 2 Double Check Detector Assembly. This product serves professionals across commercial mechanical systems, plumbing, and HVAC sectors. The 4ANLF62CG6 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62CG10 is a Type 2 Double Check Detector Assembly. This product serves professionals across oil and gas, HVAC, and fire protection sectors. Apollo Valves is recognized globally for engineering products that meet strict performance standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF62EG6 from Apollo is a Type 2 Double Check Detector Assembly. This product serves professionals across oil and gas, industrial processing, and marine sectors. Backed by Apollo's commitment to quality, the 4ANLF62EG6 is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62EG10 is a Type 2 Double Check Detector Assembly. It is commonly found in fire protection, oil and gas, and plumbing applications. Apollo products are trusted by engineers and specifiers worldwide.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF64EC3 is a Type 2 Double Check Detector Assembly. Typical applications span commercial mechanical systems, oil and gas, and plumbing environments. Backed by Apollo's commitment to quality, the 4ANLF64EC3 is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4SGLF10C03 from Apollo is a Backflow Preventer. Typical applications span fire protection, industrial processing, and marine environments. Apollo products are trusted by engineers and specifiers worldwide.
$4,409.63$11,968.66
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4SGLF10C09 is a Backflow Preventer. It is commonly found in HVAC, plumbing, and commercial mechanical systems applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. This product meets relevant ASME and UL standards.
$5,446.45$14,782.83
Available for Purchase
Subject to factory lead times
The Apollo 4SG10E02 is a Backflow Preventer. It is commonly found in oil and gas, industrial processing, and fire protection applications. Backed by Apollo's commitment to quality, the 4SG10E02 is built to perform under real-world conditions.
$9,489.50$25,756.53
Available for Purchase
Subject to factory lead times
The 4ANLF62EG9 from Apollo is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 8" (2 x Groove). This product serves professionals across fire protection, marine, and plumbing sectors. Apollo products are trusted by engineers and specifiers worldwide. This product meets relevant NSF and UL standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF62GG3 from Apollo is a Type 2 Double Check Detector Assembly. Typical applications span plumbing, fire protection, and industrial processing environments. Backed by Apollo's commitment to quality, the 4ANLF62GG3 is built to perform under real-world conditions. This product meets relevant ASME and UL standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62AG3 from Apollo is a Type 2 Double Check Detector Assembly. It is commonly found in plumbing, commercial mechanical systems, and marine applications. Apollo Valves is recognized globally for engineering products that meet strict performance standards. This product meets relevant ASME and FM standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62AG8 is a Type 2 Double Check Detector Assembly. It is commonly found in HVAC, oil and gas, and commercial mechanical systems applications. Apollo products are trusted by engineers and specifiers worldwide. It is designed to comply with applicable ASME and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62AG7 is a Type 2 Double Check Detector Assembly. This product serves professionals across plumbing, HVAC, and fire protection sectors. The 4ANLF62AG7 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62CG3 is a Type 2 Double Check Detector Assembly. This product serves professionals across commercial mechanical systems, fire protection, and oil and gas sectors. Apollo products are trusted by engineers and specifiers worldwide.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF62CG8 is a Type 2 Double Check Detector Assembly. Typical applications span industrial processing, commercial mechanical systems, and HVAC environments. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. This product meets relevant UL and NSF standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62CG7 from Apollo is a Type 2 Double Check Detector Assembly. It is commonly found in plumbing, industrial processing, and fire protection applications. Apollo products are trusted by engineers and specifiers worldwide. This product meets relevant ASME and NSF standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62EG3 is a Type 2 Double Check Detector Assembly. It is commonly found in oil and gas, fire protection, and marine applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF62EG8 from Apollo is a Type 2 Double Check Detector Assembly. It is commonly found in fire protection, industrial processing, and commercial mechanical systems applications. Apollo Valves is recognized globally for engineering products that meet strict performance standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF62EG7 from Apollo is a Type 2 Double Check Detector Assembly. Typical applications span commercial mechanical systems, oil and gas, and fire protection environments. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable UL and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62AG4 from Apollo is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 4" (Flange x Groove). This product serves professionals across HVAC, fire protection, and industrial processing sectors. Apollo products are trusted by engineers and specifiers worldwide.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62CG4 from Apollo is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 6" (Flange x Groove). It is commonly found in HVAC, industrial processing, and marine applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62EG4 is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 8" (Flange x Groove) per the manufacturer's specifications. Typical applications span commercial mechanical systems, oil and gas, and industrial processing environments. Backed by Apollo's commitment to quality, the 4ANLF62EG4 is built to perform under real-world conditions. It is designed to comply with applicable ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62AG6 is a Type 2 Double Check Detector Assembly. Typical applications span fire protection, marine, and commercial mechanical systems environments. Backed by Apollo's commitment to quality, the 4ANLF62AG6 is built to perform under real-world conditions. It is designed to comply with applicable ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62AG10 is a Type 2 Double Check Detector Assembly. It is commonly found in oil and gas, fire protection, and commercial mechanical systems applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62CG6 from Apollo is a Type 2 Double Check Detector Assembly. This product serves professionals across commercial mechanical systems, plumbing, and HVAC sectors. The 4ANLF62CG6 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62CG10 is a Type 2 Double Check Detector Assembly. This product serves professionals across oil and gas, HVAC, and fire protection sectors. Apollo Valves is recognized globally for engineering products that meet strict performance standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF62EG6 from Apollo is a Type 2 Double Check Detector Assembly. This product serves professionals across oil and gas, industrial processing, and marine sectors. Backed by Apollo's commitment to quality, the 4ANLF62EG6 is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62EG10 is a Type 2 Double Check Detector Assembly. It is commonly found in fire protection, oil and gas, and plumbing applications. Apollo products are trusted by engineers and specifiers worldwide.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF64EC3 is a Type 2 Double Check Detector Assembly. Typical applications span commercial mechanical systems, oil and gas, and plumbing environments. Backed by Apollo's commitment to quality, the 4ANLF64EC3 is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4SGLF10C03 from Apollo is a Backflow Preventer. Typical applications span fire protection, industrial processing, and marine environments. Apollo products are trusted by engineers and specifiers worldwide.
$4,409.63$11,968.66
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4SGLF10C09 is a Backflow Preventer. It is commonly found in HVAC, plumbing, and commercial mechanical systems applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. This product meets relevant ASME and UL standards.
$5,446.45$14,782.83
Available for Purchase
Subject to factory lead times
The Apollo 4SG10E02 is a Backflow Preventer. It is commonly found in oil and gas, industrial processing, and fire protection applications. Backed by Apollo's commitment to quality, the 4SG10E02 is built to perform under real-world conditions.
$9,489.50$25,756.53
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.