A.r.i. RP-500 User Manual
RP-500 Reduced Pressure Backfl ow Preventer
OPERATIONS, MAINTENANCE AND
TROUBLESHOOTING GUIDE
2 • RP-500 Operations, Maintenance and Troubleshooting Guide A.R.I.
Table of Contents
Features, Applications and Specifi cations ..........................................................................3
Installation ..............................................................................................................................4
Operation ................................................................................................................................5
Testing Procedures ................................................................................................................6
Maintenance ...........................................................................................................................8
Troubleshooting Guide.........................................................................................................9
Replacement Parts List .......................................................................................................10
RP-500 Operations, Maintenance and Troubleshooting Guide A.R.I. • 3
The RP-500 Reduced Pressure Backfl ow Preventer consists of:
• Two independent-acting spring-loaded check valves - an inlet and an outlet valve.
• An automatic differential Relief Valve (located in the “zone” between the check valves) .
• Two resilient seated shut off valves – one on the inlet, the other on the outlet.
• Four test cocks.
PRODUCT FEATURES
• Compact, lightweight size makes it easy and quick to install.
• Requires only a Phillips-head screwdriver to disassemble and reassemble – no special tools needed .
• Durable, made of non-corrosive plastic thermal resin material:
- Withstands the toughest environments.
- Unlike a brass Backfl ow Preventer, the RP-500 is less susceptible to vandalism and theft.
- UV resistant – endures heat and direct sun.
• Low head loss – optimizes energy, saving energy costs.
The RP-500 is approved by the following Standards Authorities:
Approved under :
USA : NSF61 (Drinking water), ASSE 1013, AWWA C511, Approved by the Foundation for Cross
Connection Control and Hydraulic Research at the University of Southern California, Listed for Uniform
Plumbing Code.
Australia : AS4020 (Drinking water), Watermark AS2845.1.
France : ACS.
APPLICATIONS
To protect potable water lines and other installations against backsiphonage and backpressure of
contaminated water.
For irrigation system and water handling applications.
SPECIFICATIONS
• Operating pressure: up to 150 psi
• Operating temperature: up to 110º F
• Valve sizes: ½”, ¾”, 1”, 1¼”, 1½”, 2”
Features, Applications and Specifi cations
4 • RP-500 Operations, Maintenance and Troubleshooting Guide A.R.I.
Installation
FIGURE 1
GENERAL INSTALLATION GUIDELINES
A. Install the RP-500 Backfl ow Preventer in a location accessible to periodic fi eld testing and
maintenance. Mount the RP-500 in a horizontal position with adequate clearance from walls and/
or obstructions. A 12” to 33” clearance is needed between the lowest portion of the device and
fl oor.
B. Adequate drainage is needed for discharge. A Drainage Funnel is provided so the discharge may
be piped away (See FIGURE 1).
NOTE: Never place the RP-500 where it may become submerged in standing water.
C. Before installing the RP-500, thoroughly fl ush all upstream piping to remove debris.
D. When the shut-off valves are supplied separately, install them with a Test Cock on the Inlet Shut-
off Valve.
E. It is recommended that a “Y” strainer be installed before the inlet of the RP-500 to prevent debris
from entering the device.
F. After installing the assembly, close the Outlet Shut-off Valve, pressurize the RP-500 and release the
air through Test Cock 4. Then, open the Outlet Shut-off Valve.
RECOMMENDATIONS
• Do not install in areas subject to extended periods of freezing
temperatures.
• The product must be protected from excessive pressure increases,
caused by thermal expansion or water hammer, which can cause
damage to the valve.
• DO NOT USE ANY PIPE DOPE, OIL, GREASE OR SOLVENT
ON ANY PARTS unless instructed to do so.
• Parts should fi t together freely. Do not force parts to fi t.
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