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
Centro partners 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!
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New Full Pattern Wafer Check Valves in PVC and CPVC, sizes 2" - 8' with FPM or EPDM Gasket and Disc Seals. Spring return option in 316 Stainless Steel or Hastelloy materials. No spacers or specialty flanges required.
$1,672.28$1,817.75
Should ship between 07 Nov and 11 Nov
Subject to factory lead times
New Full Pattern Wafer Check Valves in PVC and CPVC, sizes 2" - 8' with FPM or EPDM Gasket and Disc Seals. Spring return option in 316 Stainless Steel or Hastelloy materials. No spacers or specialty flanges required.
$2,700.44$2,935.35
Should ship between 07 Nov and 11 Nov
Subject to factory lead times
New Full Pattern Wafer Check Valves in PVC and CPVC, sizes 2" - 8' with FPM or EPDM Gasket and Disc Seals. Spring return option in 316 Stainless Steel or Hastelloy materials. No spacers or specialty flanges required.
$1,821.69$1,980.15
Should ship between 07 Nov and 11 Nov
Subject to factory lead times
New Full Pattern Wafer Check Valves in PVC and CPVC, sizes 2" - 8' with FPM or EPDM Gasket and Disc Seals. Spring return option in 316 Stainless Steel or Hastelloy materials. No spacers or specialty flanges required.
$1,944.55$2,113.70
Should ship between 07 Nov and 11 Nov
Subject to factory lead times
The Aladco Clean-Check valve is a normally closed check valve that can be either overridden manually or by air piloting to allow two-way flow. The tightly sealed Clean-Check valves are used on pneumatic devices to stop motion upon loss of air pressure and prevent the device from drifting. The Clean-Check valve, being vent free, is designed specifically for pneumatic applications used in clean/sanitary environments. The Clean-Check valve is also highly tolerant of external dust, dirt, oil, grease, detergent, cleaning solutions, and cutting fluids. The unique bubble-tight seal keeps devices from drifting toward the “checked” position in the event of pressure loss or fluctuation. To release the seal, press the manual override button or operate the pilot. Aladco highly recommends the use of spring centered 3 position 5-way centered vented valves for directional control with the use of Clean-Check valves.
$180.23
Available for Purchase
Subject to factory lead times
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
$104.85$124.14
Available for Purchase
Subject to factory lead times
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
$65.47$77.52
Available for Purchase
Subject to factory lead times
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
$66.71$78.99
Available for Purchase
Subject to factory lead times
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
$76.28$90.32
Available for Purchase
Subject to factory lead times
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
$66.71$78.99
Available for Purchase
Subject to factory lead times
The Apollo® 70 Series is the most widely used general purpose bronze ball valve on the market today. The 70-100-BC model is a 2-piece standard port* ball valve combined with bubble-tight check capabilities and positive shut-off. Cast and machined in Apollo’s South Carolina manufacturing plants, these valves provide trusted performance and a wide range of options.Chromium Plated BallReinforced TFE Seats & Stuffing Box RingBlowout-Proof Stem DesignAdjustable Packing Gland
$191.62$226.88
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$166.54$197.18
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$370.06$438.15
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$290.01$343.37
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$85.30$101.00
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$85.30$101.00
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$602.38$713.21
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$677.42$802.06
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$1,303.91$1,543.82
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$121.14$143.43
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$85.30$101.00
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$2,183.74$2,585.53
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$218.48$258.68
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$165.18$195.57
Available for Purchase
Subject to factory lead times
New Full Pattern Wafer Check Valves in PVC and CPVC, sizes 2" - 8' with FPM or EPDM Gasket and Disc Seals. Spring return option in 316 Stainless Steel or Hastelloy materials. No spacers or specialty flanges required.
$1,672.28$1,817.75
Should ship between 07 Nov and 11 Nov
Subject to factory lead times
New Full Pattern Wafer Check Valves in PVC and CPVC, sizes 2" - 8' with FPM or EPDM Gasket and Disc Seals. Spring return option in 316 Stainless Steel or Hastelloy materials. No spacers or specialty flanges required.
$2,700.44$2,935.35
Should ship between 07 Nov and 11 Nov
Subject to factory lead times
New Full Pattern Wafer Check Valves in PVC and CPVC, sizes 2" - 8' with FPM or EPDM Gasket and Disc Seals. Spring return option in 316 Stainless Steel or Hastelloy materials. No spacers or specialty flanges required.
$1,821.69$1,980.15
Should ship between 07 Nov and 11 Nov
Subject to factory lead times
New Full Pattern Wafer Check Valves in PVC and CPVC, sizes 2" - 8' with FPM or EPDM Gasket and Disc Seals. Spring return option in 316 Stainless Steel or Hastelloy materials. No spacers or specialty flanges required.
$1,944.55$2,113.70
Should ship between 07 Nov and 11 Nov
Subject to factory lead times
The Aladco Clean-Check valve is a normally closed check valve that can be either overridden manually or by air piloting to allow two-way flow. The tightly sealed Clean-Check valves are used on pneumatic devices to stop motion upon loss of air pressure and prevent the device from drifting. The Clean-Check valve, being vent free, is designed specifically for pneumatic applications used in clean/sanitary environments. The Clean-Check valve is also highly tolerant of external dust, dirt, oil, grease, detergent, cleaning solutions, and cutting fluids. The unique bubble-tight seal keeps devices from drifting toward the “checked” position in the event of pressure loss or fluctuation. To release the seal, press the manual override button or operate the pilot. Aladco highly recommends the use of spring centered 3 position 5-way centered vented valves for directional control with the use of Clean-Check valves.
$180.23
Available for Purchase
Subject to factory lead times
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
$104.85$124.14
Available for Purchase
Subject to factory lead times
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
$65.47$77.52
Available for Purchase
Subject to factory lead times
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
$66.71$78.99
Available for Purchase
Subject to factory lead times
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
$76.28$90.32
Available for Purchase
Subject to factory lead times
The Apollo 61-700 check valve is ideally suited for cold water, and air applications for prevention of reverse flow. The modular check cartridge provides superior leak-tight performance with low pressure loss. It is rated at 230 PSIG with a maximum temperature of 200°F.Sizes: 1/4" - 1"Acetyl Check Valve BodyNitrile (Buna-N) Check SealsASTM B16 Brass HousingCheck Opening Pressure: .5 psi
$66.71$78.99
Available for Purchase
Subject to factory lead times
The Apollo® 70 Series is the most widely used general purpose bronze ball valve on the market today. The 70-100-BC model is a 2-piece standard port* ball valve combined with bubble-tight check capabilities and positive shut-off. Cast and machined in Apollo’s South Carolina manufacturing plants, these valves provide trusted performance and a wide range of options.Chromium Plated BallReinforced TFE Seats & Stuffing Box RingBlowout-Proof Stem DesignAdjustable Packing Gland
$191.62$226.88
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$166.54$197.18
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$370.06$438.15
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$290.01$343.37
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$85.30$101.00
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$85.30$101.00
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$602.38$713.21
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$677.42$802.06
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$1,303.91$1,543.82
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$121.14$143.43
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$85.30$101.00
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$2,183.74$2,585.53
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$218.48$258.68
Available for Purchase
Subject to factory lead times
Apollo 61 Series Ball Cone® Check Valves offer reliable protection against reverse flow and exceptional resistance to chemicals and corrosion using proven ASTM quality materials. Well-suited for a broad range of applications, including saturated steam and chemical service. May be installed in both horizontal and vertical flow with upward flow. Made in the USA.Spring ActuatedTight Shut-off with Liquid MediaFlow Straight-Through Design EfficiencyRPTFE Ball Cone for Chemical Resistance100% Factory Tested
$165.18$195.57
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.