Brochure

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The backfl ow preventer prevents contaminated water from back-shiphoning
into the the potable water supply system. This may occur when the pressure
in the potable water supply system changes causing water fl ow reversal. The
backfl ow preventer is installed between the potable water supply system
and the internal domestic water supply system, creating a safety zone which
prevents the water in the two systems from coming into contact.
BACKFLOW PREVENTER
Testable reduced pressure zone backfl ow
preventer.
DZR low lead brass body.
Max. working pressure: 150 psi.
Max. working temperature: 150°F.
Certifi ed to: ASSE 1013, CSA B64.4,
NSF372, Low Lead Laws and listed by
ICC-ES.
Meets codes IPC, IRC & UPC for use in
accordance with the U.S. and Canadian
plumbing codes.
574
Backfl ow Preventer
tech. broch. 01022
2
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2
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Code Description Lbs USD
574004A ½" F NPT 5.0
500.00
Testable reduced pressure zone backfl ow
preventer.
DZR low lead brass body.
Max. working pressure: 150 psi.
Max. working temperature: 150°F.
Certifi ed to: ASSE 1013, CSA B64.4,
NSF372, Low Lead Laws and listed by
ICC-ES.
Meets codes IPC, IRC & UPC for use in
accordance with the U.S. and Canadian
plumbing codes.
574
Backfl ow Preventer
tech. broch. 01022
2
nd
QTR
2
nd
QTR
Code Description Lbs USD
574050A ¾" F NPT 5.0
600.00
Dual check continuous pressure backfl ow
preventer with atmospheric vent.
DZR low Lead brass body.
Max. working pressure: 175 psi.
Working temperature range: 32—210°F.
Emergency backpressure temperature: 250°F
Certifi ed to: ASSE 1012, CSA B64.3, NSF
372, Low Lead Laws and listed by ICC-ES.
Meets codes IPC, IRC & UPC for use in
accordance with the U.S. and Canadian
plumbing codes.
573
Backfl ow Preventer
ASSE 1012
Code Description Lbs USD
573403A ½" NPT female inlet/outlet 1.7
126.80
573406A ½" press inlet/outlet 1.7 153.60
573409A ½" sweat inlet/outlet 1.7 120.80
573493A ½" sweat inlet x ½" F NPT outlet 1.7 123.90
573503A ¾" NPT female inlet/outlet 1.7 133.10
ASSE 1013
ASSE 1013
tech. broch. 01061
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The testable reduced pressure zone backfl ow preventer is composed of a
body with a removable cover, upstream and downstream check valves and
relief valve. The two check valves create three separate pressure zones:
upstream or inlet zone; intermediate, also known as the reduced pressure
zone; and a downstream, or outlet zone. Each has a test port to measure
pressure. A relief valve is located in the lower part of the reduced pressure
zone. The valve stem of the relief valve is connected to the diaphragm, and
is forced upward by the spring. The diaphragm separates the water in the
upstream zone in the operation chamber from the water in the reduced
pressure zone (RPZ) chamber