HomeMy WebLinkAbout360.2REDUCED PRESSURE
BACKFLOW ASSEMBLY
LINE-SIZED WASHINGTON STATE-APPROVED RPBA WITH TWO (2) RESILIENT-SEATED SHUT-OFF VALVES AND
FOUR (4) RESILIENT-SEATED TEST COCKS. RPBA SHALL BE INSTALLED CENTERED IN THE HEATED ENCLOSURE
WITH MINIMUM 3" CLEARANCE TO ALL SIDES AND MINIMUM 3" CLEARANCE TO CEILING WHEN VALVES ARE
FULLY OPEN
PIPE SUPPORT ADJUSTABLE PIPE SADDLE SUPPORT, GRINNELL FIG 264 OR EQUAL, WITH BASE, BOLTED TO FLOOR
ADAPTER RESTRAINED FLANGE ADAPTER, EBAA IRON SERIES 2100 MEGAFLANGE OR EQUAL
WATER MAIN CLASS 53 DI PIPE (PExFL OR FLxFL)
BEND 90° BEND (FLxFL OR FLxMJ WITH RESTRAINED JOINTS)
PIPE PENETRATION SEAL PIPE PENETRATION WITH WATER-TIGHT GROUT
ENCLOSURE INSULATED ENCLOSURE SIZED TO FIT RPBA, ASSE 1060 CERTIFIED, SAFE-T-COVER OR EQUAL
(NOTE: BURIED VAULT IS NOT PERMITTED FOR RPBA)
DRAIN ENCLOSURE DRAIN SIZED IN ACCORDANCE WITH AWWA CROSS CONNECTION CONTROL MANUAL
ELECTRICAL CONDUIT RIGID CONDUIT PER ELECTRICAL PERMIT REQUIREMENTS
ELECTRICAL OUTLET 120-VOLT OUTDOOR ELECTRICAL OUTLET WITH COVER, INSTALL HEAT TAPE FOR FREEZE PROTECTION
CONCRETE SLAB CONCRETE SLAB (MINIMUM 2,000 PSI) SIZED TO FIT RPBA AND ENCLOSURE PER MANUFACTURER,
REINFORCED WITH 6x6 W2.9x2.9 WELDED WIRE FABRIC
BLOCKING CONCRETE BLOCKING PER STD PLAN 330.1
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MATERIALS
NOTES:
1.ALL RPBAs MUST BE LISTED ON THE LATEST VERSION OF "BACKFLOW ASSEMBLIES APPROVED FOR INSTALLATION IN WASHINGTON STATE",
PUBLISHED BY THE STATE OF WASHINGTON DEPARTMENT OF HEALTH.
2.THE RPBA MUST BE TESTED BY A WASHINGTON STATE CERTIFIED BACKFLOW ASSEMBLY TESTER UPON INSTALLATION AND ANNUALLY
THEREAFTER. ASSEMBLY TO BE MAINTAINED BY PROPERTY OWNER. A COPY OF THE TEST REPORT SHALL BE SENT TO THE CITY OF RENTON
WATER UTILITY CROSS CONNECTION CONTROL SPECIALIST, FAX 425-430-7207, EMAIL BACKFLOW@RENTONWA.GOV.
3.RPBA AND ENCLOSURE SHALL BE LOCATED ON PRIVATE PROPERTY AND AS NEAR AS POSSIBLE TO THE WATER METER.
4.PROVIDE MINIMUM 24" LEVEL, UNOBSTRUCTED AREA AROUND ENCLOSURE.
5.EACH VALVE SHALL BE MARKED WITH MODEL NUMBER AND DESIGNATION OF RESILIENT SEAT, SUCH AS "RS" OR "R", WHICH MUST BE
CAST, MOLDED, OR AFFIXED ONTO THE BODY OR BONNET OF THE VALVE. ALL FERROUS-BODIED VALVES SHALL BE COATED WITH A
MINIMUM OF 4 MILS EPOXY OR EQUIVALENT POLYMERIZED COATING.
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6"
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SERVICE
FROM METER
SERVICE
TO BUILDING
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TO OWNER'S
ELECTRICAL PANEL
4"
MIN 2"FINISHED
GRADE
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H12" MIN
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IPROPERTY LINEF
PUBLIC WORKS
DEPARTMENT
APPROVED:
DATEMartin Pastucha
Public Works Administrator
3" TO 10" RPBA
HEATED ENCLOSURE INSTALLATION
DOMESTIC AND IRRIGATION SERVICES
STD. PLAN - 360.2
6/28/2023