Brochure

83
6
C
Testable reduced pressure zone backow
preventer.
DZR low lead brass body.
Max. working pressure: 150 psi.
Max. working temperature: 150°F.
574
RPZ Backow Preventer
Code Description Lbs USD
574700A 1¼" FNPT 14 723.00
574706A 1¼" press 14 823.00
BACKFLOW PREVENTERS, RPZ TYPE, FOR PLUMBING AND HYDRONICS
Complies with: ASSE 1013, CSA B64.4, NSF/ANSI 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.
FLOW CHANNEL
DIAPHRAGM
DISCHARGE
VALVE
UPSTREAM CHECK
VALVE
UPSTREAM
PRESSURE
INTERMEDIATE
PRESSURE
DOWNSTREAM
CHECK VALVE
TEST PORT
CAP
RELIEF
SCREW
Installation
The installation of backow preventer should only be carried out by qualied
personnel in accordance with applicable codes and regulations.
The backow preventer includes an upstream and downstream shut-off valve.
Install the unit in an accessible area which is not susceptible to accidental
ooding. The equipment is to be installed horizontally only. The air gap must be
connected in accordance with local codes. See page 9 and 10 for discharge
extension pipe size and type, sourced separately.
Before installing the backow preventer the pipe should be cleaned with a
high-capacity water jet.
In order to protect the public supply system the backow preventer is
installed after the water meter and, to protect supplies for sanitary purposes
in the internal system, it is installed where contamination can take place, eg:
centralized heating systems, garden watering systems etc.
min
1.5 ft
1.5 to 4.5 ft
GROUND, FLOOR, GANGWAY
SEWER
TUNNEL
Pipe
*source extension pipe separately
DISCHARGE AIR GAP
DISCHARGE EXTENSION
PIPE* TO SEWER
Maintenance
Since the backow preventer valve is used to ensure the safety of domestic
water supplies it must be inspected per local codes. The rst sign that the
equipment is not functioning properly, generally associated with the presence
of sand or other impurities, is indicated by a permanent leakage through the
discharge. This loss is just an initial warning sign and does not completely
jeopardize the safety of the check mechanism but means that the unit should
be dismantled and the equipment should be cleaned. In the event of dripping
at the discharge it is recommended to create strong circulation ow for a few
minutes by opening one or more taps. This is usually sufcient to ush out any
sand or other impurities to restore normal operation.
Construction details 1¼" RPZ Backow Preventer
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