Includes gallon per minute meter for leak detection
Maximum Working Pressure: 175 psi
UL and FM grooved gear operated butterfly valves with tamper switch
Extremely compact design for smaller enclosures
Description
The 4 Inch SS Reduced Pressure Detector Backflow Preventer (957ZRPDA-BFG) is designed to protect potable water supplies from contamination caused by backflow and backsiphonage in fire protection systems. This 4-inch assembly features a durable 304 stainless steel body, UL and FM approved grooved gear operated butterfly valves with tamper switches, and a bottom-mounted cast stainless steel relief valve. Its compact design supports horizontal Z pattern installation and includes a gallon per minute meter for detecting leaks and unauthorized water use. It handles a maximum working pressure of 175 PSI.
Help Me Connect
Connections and Installation
This assembly features groove couplings which allow for integral pipeline adjustment, simplifying installation and ensuring proper alignment.
It is approved specifically for horizontal Z pattern installation, which helps optimize space and configuration in various setups.
This 4 inch reduced pressure detector backflow preventer assembly is designed to prevent the reverse flow of fire protection substances and non-potable water into the potable water supply. It protects against backsiphonage and backpressure in accordance with national plumbing codes and water authority requirements.
WARNING: It is illegal to use this product in any plumbing system providing water for human consumption such as drinking or dishwashing, in the United States. Before installing standard material product, consult your local water authority, building and plumbing codes.
Features
Extremely compact design, lighter than traditional backflow preventers
304 (Schedule 40) stainless steel housing and sleeve for durability
UL and FM grooved gear operated butterfly valves with tamper switch
Approved for horizontal Z pattern installation
Furnished with a gallon per minute meter to detect underground leaks and unauthorized water use
Bottom mounted cast stainless steel relief valve for corrosion resistance
Patented torsion spring check modules for ease of serviceability and simplified maintenance
Groove couplings for ease of installation and pipeline alignment
Pins & Fasteners Material: 300 Series stainless steel
Maximum Working Pressure: 175 psi (12.1 bar)
Temperature Range: 33°F - 140°F (0.5°C - 60°C)
Certificates & Approvals
ASSE 1047
CSA B64.4
UL Classified
FM Approved
FAQs
What is the primary purpose of this 4-inch backflow preventer?
Its primary purpose is to prevent the reverse flow of non-potable water or fire protection substances from entering the potable water supply due to backsiphonage or backpressure, adhering to national plumbing codes.
What are the main materials used in the construction of this backflow preventer?
The housing and sleeve are made from 304 (Schedule 40) stainless steel. It also features EPDM, silicone, and Buna 'N' elastomers, with a bottom-mounted cast stainless steel relief valve.
Is this backflow preventer approved for potable water lines for human consumption?
No, it is illegal to use this product in any plumbing system providing water for human consumption in the United States. It is designed for fire protection and non-potable water applications.
What type of installation pattern is supported for this model?
This backflow preventer is specifically approved for horizontal Z pattern installation, which allows for efficient use of space.
How does the included gallon per minute meter function?
The gallon per minute meter is furnished to detect underground leaks and any unauthorized water usage within the system, providing an important monitoring capability.
