Watts LF909-QT-FDA-6 Reduced Pressure Zone Backflow
Preventor
Series LF909 Reduced Pressure Zone Assemblies are
designed to provide cross-connection control protection of the potable water
supply in accordance with national plumbing codes. This series can be utilized
in a variety of installations, including health hazard cross connections in
plumbing systems or for containment at the service line entrance. With its
exclusive relief valve design incorporating the “air- n/water-out"
principle, it provides substantially improved relief valve discharge
performance during the emergency conditions of combined back siphonage and
backpressure with both checks fouled. The LF909 features Lead Free*
construction to comply with Lead Free* installation requirements.
Features
* Replaceable seats
* Stainless steel internal parts
* No special tools required for servicing
* Captured spring check assemblies
* Fused epoxy coated & lined checks
* Industrial strength sensing hose
* Field reversible relief valve
* Air-in/water-out relief valve design provides maximum
capacity during emergency conditions.
A Reduced Pressure Zone Assembly shall be installed at
each cross connection to prevent back siphonage and back pressure backflow of
hazardous materials into the potable water supply. The assembly shall consist
of a pressure differential relief valve located in a zone between two positive
seating check valves and captured springs.
Back siphonage protection shall include provision to
admit air directly into the reduced pressure zone via a separate channel from
the water discharge channel. The assembly shall include two tightly closing
shutoff valves before and after the valve and test cocks. The Lead Free*
Reduced Pressure Zone Assembly shall comply with state codes and standards,
where applicable, requiring reduced lead content. FDA epoxy coated quarter-turn
ball valves.
The assembly shall meet the requirements of ASSE Std.
1013; AWWA Std. C511-92; CSA B64.5; and UL Classified File No. EX3185. Listed
by IAPMO (UPC). Approved by the Foundation for Cross-Connection Control and
Hydraulic Research at the University of Southern California. The assembly shall
be a Watts Series LF909.
Estimated Availability: 2-3 weeks not including shipping.
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