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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Engineered by Apollo, the 4ANLF62HE3 is a Type 2 Double Check Detector Assembly. Typical applications span industrial processing, plumbing, and HVAC environments. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable NSF and FM requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF629E3 is a Type 2 Double Check Detector Assembly. Typical applications span oil and gas, industrial processing, and commercial mechanical systems environments. 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
Engineered by Apollo, the 4ANLF620E3 is a Type 2 Double Check Detector Assembly. This product serves professionals across commercial mechanical systems, plumbing, and HVAC sectors. Apollo Valves is recognized globally for engineering products that meet strict performance standards. This product meets relevant NSF and UL standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62AE3 is a Type 2 Double Check Detector Assembly. It is commonly found in fire protection, marine, and oil and gas applications. The 4ANLF62AE3 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF62AE8 from Apollo is a Type 2 Double Check Detector Assembly. It is commonly found in commercial mechanical systems, plumbing, and industrial processing applications. The 4ANLF62AE8 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62CE3 is a Type 2 Double Check Detector Assembly. Typical applications span oil and gas, fire protection, and commercial mechanical systems environments. Apollo products are trusted by engineers and specifiers worldwide.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF62CE8 is a Type 2 Double Check Detector Assembly. This product serves professionals across HVAC, industrial processing, and marine sectors. Backed by Apollo's commitment to quality, the 4ANLF62CE8 is built to perform under real-world conditions. This product meets relevant NSF and ASME standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62EE3 from Apollo is a Type 2 Double Check Detector Assembly. It is commonly found in plumbing, fire protection, and commercial mechanical systems applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62EE8 is a Type 2 Double Check Detector Assembly. It is commonly found in HVAC, fire protection, and commercial mechanical systems applications. The 4ANLF62EE8 reflects Apollo's long-standing reputation for quality and innovation. This product meets relevant UL and FM standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62AE4 is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 4" (Flange x Groove) per the manufacturer's specifications. Typical applications span commercial mechanical systems, industrial processing, and HVAC environments. Apollo products are trusted by engineers and specifiers worldwide. It is designed to comply with applicable ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62CE4 is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 6" (Flange x Groove). It is commonly found in HVAC, fire protection, and commercial mechanical systems applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. This product meets relevant NSF and FM standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62EE4 from Apollo is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 8" (Flange x Groove). This product serves professionals across commercial mechanical systems, industrial processing, and marine 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 4ANLF62AE6 from Apollo is a Type 2 Double Check Detector Assembly. This product serves professionals across fire protection, industrial processing, and marine 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 4ANLF62AE7 from Apollo is a Type 2 Double Check Detector Assembly. Typical applications span fire protection, marine, and plumbing environments. Apollo products are trusted by engineers and specifiers worldwide. It is designed to comply with applicable UL and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62AE10 is a Type 2 Double Check Detector Assembly. Typical applications span commercial mechanical systems, HVAC, and oil and gas environments. 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 4ANLF62CE6 is a Type 2 Double Check Detector Assembly. Typical applications span industrial processing, marine, and HVAC environments. Apollo products are trusted by engineers and specifiers worldwide. This product meets relevant UL and NSF standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF62CE7 is a Type 2 Double Check Detector Assembly. Typical applications span commercial mechanical systems, HVAC, and oil and gas environments. Apollo products are trusted by engineers and specifiers worldwide. It is designed to comply with applicable NSF and FM requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62CE10 is a Type 2 Double Check Detector Assembly. It is commonly found in fire protection, oil and gas, and plumbing applications. The 4ANLF62CE10 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62EE7 is a Type 2 Double Check Detector Assembly. This product serves professionals across plumbing, oil and gas, and commercial mechanical systems sectors. Backed by Apollo's commitment to quality, the 4ANLF62EE7 is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62EE6 is a Type 2 Double Check Detector Assembly. Typical applications span marine, commercial mechanical systems, and HVAC environments. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable NSF and FM requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF62EE10 is a Type 2 Double Check Detector Assembly. This product serves professionals across commercial mechanical systems, HVAC, and plumbing sectors. The 4ANLF62EE10 reflects Apollo's long-standing reputation for quality and innovation. It is designed to comply with applicable UL and FM requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF629G9 is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 2-1/2" (2 x Groove). This product serves professionals across commercial mechanical systems, oil and gas, and plumbing 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 Apollo Valves 4ANLF62AG9 is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 4" (2 x Groove) per the manufacturer's specifications. Typical applications span commercial mechanical systems, fire protection, and oil and gas environments. Apollo Valves is recognized globally for engineering products that meet strict performance standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF62CG9 is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 6" (2 x Groove) per the manufacturer's specifications. It is commonly found in oil and gas, HVAC, and plumbing applications. Apollo Valves is recognized globally for engineering products that meet strict performance standards. This product meets relevant ASME and UL standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF62HE3 is a Type 2 Double Check Detector Assembly. Typical applications span industrial processing, plumbing, and HVAC environments. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable NSF and FM requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF629E3 is a Type 2 Double Check Detector Assembly. Typical applications span oil and gas, industrial processing, and commercial mechanical systems environments. 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
Engineered by Apollo, the 4ANLF620E3 is a Type 2 Double Check Detector Assembly. This product serves professionals across commercial mechanical systems, plumbing, and HVAC sectors. Apollo Valves is recognized globally for engineering products that meet strict performance standards. This product meets relevant NSF and UL standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62AE3 is a Type 2 Double Check Detector Assembly. It is commonly found in fire protection, marine, and oil and gas applications. The 4ANLF62AE3 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF62AE8 from Apollo is a Type 2 Double Check Detector Assembly. It is commonly found in commercial mechanical systems, plumbing, and industrial processing applications. The 4ANLF62AE8 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62CE3 is a Type 2 Double Check Detector Assembly. Typical applications span oil and gas, fire protection, and commercial mechanical systems environments. Apollo products are trusted by engineers and specifiers worldwide.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF62CE8 is a Type 2 Double Check Detector Assembly. This product serves professionals across HVAC, industrial processing, and marine sectors. Backed by Apollo's commitment to quality, the 4ANLF62CE8 is built to perform under real-world conditions. This product meets relevant NSF and ASME standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62EE3 from Apollo is a Type 2 Double Check Detector Assembly. It is commonly found in plumbing, fire protection, and commercial mechanical systems applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62EE8 is a Type 2 Double Check Detector Assembly. It is commonly found in HVAC, fire protection, and commercial mechanical systems applications. The 4ANLF62EE8 reflects Apollo's long-standing reputation for quality and innovation. This product meets relevant UL and FM standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62AE4 is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 4" (Flange x Groove) per the manufacturer's specifications. Typical applications span commercial mechanical systems, industrial processing, and HVAC environments. Apollo products are trusted by engineers and specifiers worldwide. It is designed to comply with applicable ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62CE4 is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 6" (Flange x Groove). It is commonly found in HVAC, fire protection, and commercial mechanical systems applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. This product meets relevant NSF and FM standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF62EE4 from Apollo is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 8" (Flange x Groove). This product serves professionals across commercial mechanical systems, industrial processing, and marine 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 4ANLF62AE6 from Apollo is a Type 2 Double Check Detector Assembly. This product serves professionals across fire protection, industrial processing, and marine 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 4ANLF62AE7 from Apollo is a Type 2 Double Check Detector Assembly. Typical applications span fire protection, marine, and plumbing environments. Apollo products are trusted by engineers and specifiers worldwide. It is designed to comply with applicable UL and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF62AE10 is a Type 2 Double Check Detector Assembly. Typical applications span commercial mechanical systems, HVAC, and oil and gas environments. 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 4ANLF62CE6 is a Type 2 Double Check Detector Assembly. Typical applications span industrial processing, marine, and HVAC environments. Apollo products are trusted by engineers and specifiers worldwide. This product meets relevant UL and NSF standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF62CE7 is a Type 2 Double Check Detector Assembly. Typical applications span commercial mechanical systems, HVAC, and oil and gas environments. Apollo products are trusted by engineers and specifiers worldwide. It is designed to comply with applicable NSF and FM requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62CE10 is a Type 2 Double Check Detector Assembly. It is commonly found in fire protection, oil and gas, and plumbing applications. The 4ANLF62CE10 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62EE7 is a Type 2 Double Check Detector Assembly. This product serves professionals across plumbing, oil and gas, and commercial mechanical systems sectors. Backed by Apollo's commitment to quality, the 4ANLF62EE7 is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF62EE6 is a Type 2 Double Check Detector Assembly. Typical applications span marine, commercial mechanical systems, and HVAC environments. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable NSF and FM requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF62EE10 is a Type 2 Double Check Detector Assembly. This product serves professionals across commercial mechanical systems, HVAC, and plumbing sectors. The 4ANLF62EE10 reflects Apollo's long-standing reputation for quality and innovation. It is designed to comply with applicable UL and FM requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF629G9 is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 2-1/2" (2 x Groove). This product serves professionals across commercial mechanical systems, oil and gas, and plumbing 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 Apollo Valves 4ANLF62AG9 is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 4" (2 x Groove) per the manufacturer's specifications. Typical applications span commercial mechanical systems, fire protection, and oil and gas environments. Apollo Valves is recognized globally for engineering products that meet strict performance standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF62CG9 is a Type 2 Double Check Detector Assembly. Butterfly Shut-Off Valves, 6" (2 x Groove) per the manufacturer's specifications. It is commonly found in oil and gas, HVAC, and plumbing applications. Apollo Valves is recognized globally for engineering products that meet strict performance standards. This product meets relevant ASME and UL standards.
Requires Quote
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.