Backflow Prevention
Backflow prevention devices keep contaminated water from flowing back into potable water supplies. They're required by code wherever cross-connections exist, such as boiler feeds, irrigation, fire systems and process water.
Backflow Device Types
- Reduced pressure zone (RPZ) assemblies – high-hazard protection
- Double check valve assemblies – low-hazard protection
- Pressure vacuum breakers – irrigation
- Atmospheric vacuum breakers – simple point-of-use
- Repair kits and test kits – maintenance and annual testing
Choosing a Device
The hazard level and local code determine the device. Size for flow and pressure loss, and plan for annual testing access.
Centro supplies backflow prevention devices and repair kits.
Related categories: Process Equipment | Industrial Desiccant Dehumidifiers | Heat Exchanger Applications | Thermal Fluid Heater Systems | Pumps
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Engineered by Apollo, the 4ANLF720E4 is an RP Detector Assembly 2nd Check. It is commonly found in HVAC, plumbing, and industrial processing applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable FM and ASME requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF720G4 is an RP Detector Assembly 2nd Check. It is commonly found in HVAC, commercial mechanical systems, and marine applications. 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 4ANLF720E6 is an RP Detector Assembly 2nd Check. Typical applications span HVAC, oil and gas, and industrial processing 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
Part number 4ANLF720C6 from Apollo is an RP Detector Assembly 2nd Check. It is commonly found in HVAC, industrial processing, and marine applications. Apollo products are trusted by engineers and specifiers worldwide.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF720G6 is an RP Detector Assembly 2nd Check. This product serves professionals across HVAC, industrial processing, and oil and gas sectors. The 4ANLF720G6 reflects Apollo's long-standing reputation for quality and innovation. This product meets relevant ASME and NSF standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF720E10 from Apollo is an RP Detector Assembly 2nd Check. Typical applications span plumbing, oil and gas, and fire protection environments. The 4ANLF720E10 reflects Apollo's long-standing reputation for quality and innovation. It is designed to comply with applicable UL and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF720C10 is an RP Detector Assembly 2nd Check. Typical applications span oil and gas, marine, and commercial mechanical systems environments. Apollo Valves is recognized globally for engineering products that meet strict performance standards. This product meets relevant NSF and FM standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF720G10 is an RP Detector Assembly 2nd Check. This product serves professionals across plumbing, industrial processing, and oil and gas sectors. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable ASME and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF72AC9 from Apollo is an RP Detector Assembly 2nd Check. This product serves professionals across fire protection, industrial processing, and marine sectors. 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 Valves 4ANLF72AE9 is an RP Detector Assembly 2nd Check. Typical applications span commercial mechanical systems, plumbing, and HVAC environments. 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
The 4ANLF72AG9 from Apollo is an RP Detector Assembly 2nd Check. This product serves professionals across commercial mechanical systems, industrial processing, and marine sectors. Backed by Apollo's commitment to quality, the 4ANLF72AG9 is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF72AC3 is an RP Detector Assembly 2nd Check. It is commonly found in HVAC, industrial processing, and oil and gas applications. Backed by Apollo's commitment to quality, the 4ANLF72AC3 is built to perform under real-world conditions. It is designed to comply with applicable ASME and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF72AE3 from Apollo is an RP Detector Assembly 2nd Check. It is commonly found in industrial processing, plumbing, and HVAC 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
Engineered by Apollo, the 4ANLF72AG3 is an RP Detector Assembly 2nd Check. Typical applications span marine, industrial processing, 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 ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF72AC7 from Apollo is an RP Detector Assembly 2nd Check. Typical applications span oil and gas, fire protection, and industrial processing environments. 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 4ANLF72AE7 is an RP Detector Assembly 2nd Check. This product serves professionals across commercial mechanical systems, oil and gas, and marine sectors. Backed by Apollo's commitment to quality, the 4ANLF72AE7 is built to perform under real-world conditions. It is designed to comply with applicable NSF and ASME requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF72AG7 is an RP Detector Assembly 2nd Check. Typical applications span HVAC, oil and gas, and industrial processing environments. Backed by Apollo's commitment to quality, the 4ANLF72AG7 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 4ANLF72AC8 from Apollo is an RP Detector Assembly 2nd Check. 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 NSF and FM standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF72AE8 is an RP Detector Assembly 2nd Check. It is commonly found in fire protection, HVAC, and plumbing applications. The 4ANLF72AE8 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF72AG8 from Apollo is an RP Detector Assembly 2nd Check. It is commonly found in plumbing, fire protection, and industrial processing applications. Apollo Valves is recognized globally for engineering products that meet strict performance standards. It is designed to comply with applicable ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF72AE4 from Apollo is an RP Detector Assembly 2nd Check. This product serves professionals across commercial mechanical systems, HVAC, and plumbing sectors. Apollo Valves is recognized globally for engineering products that meet strict performance standards. It is designed to comply with applicable FM and ASME requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF72AC4 is an RP Detector Assembly 2nd Check. Typical applications span oil and gas, fire protection, and industrial processing environments. The 4ANLF72AC4 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF72AG4 is an RP Detector Assembly 2nd Check. Typical applications span oil and gas, industrial processing, and fire protection environments. Backed by Apollo's commitment to quality, the 4ANLF72AG4 is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF72AC6 from Apollo is an RP Detector Assembly 2nd Check. This product serves professionals across plumbing, fire protection, and oil and gas sectors. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable ASME and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF720E4 is an RP Detector Assembly 2nd Check. It is commonly found in HVAC, plumbing, and industrial processing applications. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable FM and ASME requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF720G4 is an RP Detector Assembly 2nd Check. It is commonly found in HVAC, commercial mechanical systems, and marine applications. 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 4ANLF720E6 is an RP Detector Assembly 2nd Check. Typical applications span HVAC, oil and gas, and industrial processing 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
Part number 4ANLF720C6 from Apollo is an RP Detector Assembly 2nd Check. It is commonly found in HVAC, industrial processing, and marine applications. Apollo products are trusted by engineers and specifiers worldwide.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF720G6 is an RP Detector Assembly 2nd Check. This product serves professionals across HVAC, industrial processing, and oil and gas sectors. The 4ANLF720G6 reflects Apollo's long-standing reputation for quality and innovation. This product meets relevant ASME and NSF standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF720E10 from Apollo is an RP Detector Assembly 2nd Check. Typical applications span plumbing, oil and gas, and fire protection environments. The 4ANLF720E10 reflects Apollo's long-standing reputation for quality and innovation. It is designed to comply with applicable UL and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF720C10 is an RP Detector Assembly 2nd Check. Typical applications span oil and gas, marine, and commercial mechanical systems environments. Apollo Valves is recognized globally for engineering products that meet strict performance standards. This product meets relevant NSF and FM standards.
Requires Quote
Available for Purchase
Subject to factory lead times
Engineered by Apollo, the 4ANLF720G10 is an RP Detector Assembly 2nd Check. This product serves professionals across plumbing, industrial processing, and oil and gas sectors. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable ASME and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF72AC9 from Apollo is an RP Detector Assembly 2nd Check. This product serves professionals across fire protection, industrial processing, and marine sectors. 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 Valves 4ANLF72AE9 is an RP Detector Assembly 2nd Check. Typical applications span commercial mechanical systems, plumbing, and HVAC environments. 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
The 4ANLF72AG9 from Apollo is an RP Detector Assembly 2nd Check. This product serves professionals across commercial mechanical systems, industrial processing, and marine sectors. Backed by Apollo's commitment to quality, the 4ANLF72AG9 is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF72AC3 is an RP Detector Assembly 2nd Check. It is commonly found in HVAC, industrial processing, and oil and gas applications. Backed by Apollo's commitment to quality, the 4ANLF72AC3 is built to perform under real-world conditions. It is designed to comply with applicable ASME and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF72AE3 from Apollo is an RP Detector Assembly 2nd Check. It is commonly found in industrial processing, plumbing, and HVAC 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
Engineered by Apollo, the 4ANLF72AG3 is an RP Detector Assembly 2nd Check. Typical applications span marine, industrial processing, 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 ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF72AC7 from Apollo is an RP Detector Assembly 2nd Check. Typical applications span oil and gas, fire protection, and industrial processing environments. 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 4ANLF72AE7 is an RP Detector Assembly 2nd Check. This product serves professionals across commercial mechanical systems, oil and gas, and marine sectors. Backed by Apollo's commitment to quality, the 4ANLF72AE7 is built to perform under real-world conditions. It is designed to comply with applicable NSF and ASME requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF72AG7 is an RP Detector Assembly 2nd Check. Typical applications span HVAC, oil and gas, and industrial processing environments. Backed by Apollo's commitment to quality, the 4ANLF72AG7 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 4ANLF72AC8 from Apollo is an RP Detector Assembly 2nd Check. 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 NSF and FM standards.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo Valves 4ANLF72AE8 is an RP Detector Assembly 2nd Check. It is commonly found in fire protection, HVAC, and plumbing applications. The 4ANLF72AE8 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF72AG8 from Apollo is an RP Detector Assembly 2nd Check. It is commonly found in plumbing, fire protection, and industrial processing applications. Apollo Valves is recognized globally for engineering products that meet strict performance standards. It is designed to comply with applicable ASME and UL requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
Part number 4ANLF72AE4 from Apollo is an RP Detector Assembly 2nd Check. This product serves professionals across commercial mechanical systems, HVAC, and plumbing sectors. Apollo Valves is recognized globally for engineering products that meet strict performance standards. It is designed to comply with applicable FM and ASME requirements.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF72AC4 is an RP Detector Assembly 2nd Check. Typical applications span oil and gas, fire protection, and industrial processing environments. The 4ANLF72AC4 reflects Apollo's long-standing reputation for quality and innovation.
Requires Quote
Available for Purchase
Subject to factory lead times
The Apollo 4ANLF72AG4 is an RP Detector Assembly 2nd Check. Typical applications span oil and gas, industrial processing, and fire protection environments. Backed by Apollo's commitment to quality, the 4ANLF72AG4 is built to perform under real-world conditions.
Requires Quote
Available for Purchase
Subject to factory lead times
The 4ANLF72AC6 from Apollo is an RP Detector Assembly 2nd Check. This product serves professionals across plumbing, fire protection, and oil and gas sectors. As a leader in valves and flow control, Apollo manufactures every component to exacting standards. It is designed to comply with applicable ASME and NSF requirements.
Requires Quote
Available for Purchase
Subject to factory lead times