ATMOSPHERIC 6” NIPPLE VACUUM BREAKER
90’ ELBOW
FINISHED GRADE
UNION WITH BRASS OR SCHEDULE 80 PVC NIPPLE COPPER SEAT (TYPICAL) LENGTH AS REQUIRED
TOP OF CONCRETE
COUPLING (TYPICAL)
,. ‘_ “_ .
12” WIDE CONCRETE LATERAL LINE (TYPICAL)
PLACE AGAINST UNDI OR COMPACTED SOIL 90’ STREET ELBOW (TYPICAL) NOTES: 1. THE VACUUM BREAKER SHALL BE INSTALLED DOWNSTREAM FROM THE CONTROL VALVE. 2. EXCEPT AS NOTED, ALL PIPE AND FITTINGS SHALL BE GALVANIZED STEEL PER THE STANDARD SPECIFICATIONS. 3. CONCRETE SHALL BE 420-C-2000. 4. THE ATMOSPHERIC VACUUM BREAKER CAN BE NO LARGER THAN A 11/2” SIZE UNIT. 5. NO VALVE OR SHUT OFF SHALL BE INSTALLED DOWNSTREAM FROM THE ATMOSPHERIC VACUUM BREAKER. 6. THE BACKFLOW PREVENTER TO BE INSTALLED, SHALL BE Oi A TYPE AND MANUFACTURE CURRENTLY APPROVED BY THE COUNTY OF LOS ANGELES, DEPARTMENT OF HEALTH SERVICES. ATMOSPHERIC VACUUM BREAKER NOT TO SCALE
DEPARTMENT OF PUBLIC WORKS BUREAU OF ENGINEERING CITY OF LOS ANGELES 90’ ELBOW (TYPICAL)
PRESSURE VACUUM BREAKER FINISHED GRADE
GATE VALVE WITH HANDWHEEL (TYPICAL) 3” MINIMUM CLEARANCE TO HANDWHEEL ON OPEN POSITION (TYPICAL) 8” DIAMETER X 12” CONCRETE --I-_. - VALVE BOX WITH COVER (TYPICAL 1 FINISHED GRADE (HARD - SURFACE) 2” ABOVE GRADE FOR GROUND COVER AND I” FOR LAWN AREA
tKG- UNION WITH BRASS OR COPPER SEAT (TYPICAL MAIN LINE (TYPICAL) x
SCHEDULE 80 PVC NIPPLE LENGTH AS I” CRUSHED ROCK SUMP REQUIRED (TYPICAL) / (TYPICAL)
COUPLING (TYPICAL) ti 90” STREET ELBOW . (TYPICAL)
12” WIDE CONCRETE \ PLACE AGAINST UNDISTURBED OR COMPACTED SOIL
NOTES: I. EXCEPT AS NOTED, ALL PIPE AND FllTlNGS SHALL BE GALVANIZED STEEL PER THE STANDARD SPECIFICATIONS. 2. CONCRETE SHALL BE 420 -C- 2000. 3. THE PRESSURE VACUUM BREAKER SHALL BE TESTED BY A CERTIFIED TESTER AND THE RESULTS SENT TO THE LOS ANGELES COUNTY HEALTH DEPARTMENT ON THE”BACKFLOW PREVENTION DEVICE FIELD TESTING AND MAINTENANCE REPORT!’ A DUPLICATE COPY OF THE REPORT SHALL BE FURNISHED TO THE ENGINEER. 4. THE BACKFLOW PREVENTER TO BE INSTALLED. SHALL BE OF A TYPE AND MANUFACTURE CURRENTLY APPROVED BY THE COUNTY OF LOS ANGELES, DEPARTMENT OF HEALTH SERVICES.
PRESSURE VACUUM BREAKER NOT TO SCALE
STAN DAR f-j PLAN N 0. S - 6 56 -0 ~W_TINDEX NUMBER B-3958 1 SHEET 2 OF 4 SHEETS REDUCED PRESSURE 3” NIPPLE (TYPICAL) BACKFLOW PREVENTER
FINISHED GRADE 90” ELBOW (TYPICAL)
GATE VALVE WITH HANDWHEEL (TYPICAL 1 3” MINIMUM CLEARANCE TO HANDWHEEL ON OPEN POSITION (TYPICAL)
8” DIAMETER CONCRETE VALVE BOX WITH COVER
FINISHED GRADE (HARD-SURFACE)
/ LAWN AREA \
I” CRUSHED ROCK SUMP
SCHEDULE 80 PVC NIPPLE LENGTH AS REQUIRED (TYPICAL) 90” STREET ELBOW
COUPLING .-PLACE AGAINST UNDISTURBED OR 12” WIDE CONCRETE COMPACTED SOIL
MAIN -LINE (TYPICAL) i
NOTES: I. EXCEPT AS NOTED, ALL PIPE AND FITTINGS SHALL BE GALVANIZED STEEL PER THE STANDARD SPECIFICATIONS. 2. CONCRETE SHALL BE 420 - C- 2000. 3.THE BACKFLOW PREVENTER SHALL BE TESTED BY A CERTIFIED TESTER AND THE RESULTS SENT TO THE LOS ANGELES COUNTY HEALTH DEPARTMENT ON THE “BACKFLOW PREVENTION DEVICE FIELD TESTING AND MAINTENANCE REPORT:’ A DUPLICATE COPY OF THE REPORT SHALL BE FURNISHED TO THE ENGINEER. 4. THE BACKFLOW PREVENTER TO BE INSTALLED, SHALL BE OF A TYPE AND MANUFACTURE CURRENTLY APPROVED BY THE COUNTY OF LOS ANGELES, DEPARTMENT OF HEALTH SERVICES.
-REDUCED PRESSURE BACKFLOW PREVENTER-TYPE I NOT TO SCALE
‘STANDARD PLAN NO. S-656-O VAULT INDEX NUMBER B-3958 SHEET 3 . .
CIRCULAR ENCLOSURE 14 GAUGE STEEL GALVANIZED REDUCED PRESSURE BACKFLOW AFTER FABRICATION PREVENTION DEVICE AND GATE VALVES
GRIND FLUSH ALL AROUND
PAINT EXTERIOR SURFACES OF ENCLOSURE WITH I COAT OF \ PRIMER AN APPROVED LANDSCAPE SECTION
-43/32” 314”X 22” DIA. BOLT riz (SEE NOTE NO. 4 BELOW) - - NIPPLE - LENGTH AS REQUIRED (TYPICAL 1 I SCHEDULE 80 PVC =z COUPLING (TYPICAL 1 -i.-. - 4- I” DIAMETER DRAIN HOLES EQUALLY SPACED AROUND ENCLOSURE - LOWEST PART OF DEVICE LEVEL FINISHED GRADE --I---# h-! !‘-I * e ‘,t . f L CONCRETE ENCLOSURE BASE 6-I” DIAMETER DRAIN HOLES EQ?IALLY SFACED 4 - L 2”X I !‘2”X !b” - I” LONG AROUND ENCLOSURE ------//~_;_L~*~_~f EOUALLY SPACED
;‘fiCE ON COMPACTED / ’ “i 4 PER MANUFACTURE’S SPECIFICATIOI
/ 900 ELBOW (TYPICAL) ‘S2;;M”dEP PEA GRAVEL
MAIN LINE (TYPICAL)
.. NOTES:
I. EXCEPT AS NOTED, ALL PIPE AND FITTINGS SHALL BE BRASS PER ASTM DESIGNATION* 843.’ 2. CONCRETE SHALL BE 420 -C- 2000. . 3. THE BACKFLOW PREVENTER SHALL BE TESTED BY A CERTIFIED TESTER AND THE RESULTS SENT TO THE ‘a l_OS ANGELES COUNTY HEALTH DEMRTMENT ON THE “BACKFLOW PREVENTION DEVICE FIELD TESTING ( AND MAINTENANCE REPORT:’ A DUPLICATE COPY OF THE REPORT SHALL BE FURNISHED TO THE ENGINEER. 4. PROVIDE 3/4* @IAMETER BOLT THROUGH ENCLOSURE TO LOCK ENCLOSURE TO BACKFLOW PREVENTER. DRILL BOLT END WITH 3/e” HOLE TO PROVIDE FOR LOCK. 5. BACKFLOW DEVICE SHALL BE INSTALLED AT LOCATION INDICATED ON PLANS. A MINIMUM OF 6” ABOVE FLOOD LINE MUST BE MAINTAINED. 6. THE BACKFLOW PREVENTER TO BE INSTALL. SHALL BE OF A TYPE AND MANUFACTURE CURRENTLY APPROVED BY THE COUNTY OF LOS ANGELES, DEPARTMENT OF HEALTH SERVICES.
REDUCED PRESSURE BACKFLOW PREVENTER & ENCLOSURE-TYPE 2 NOT TO SCALE
STANDARD PLAN NO. S-656-O VAULT INDEX NUMBER B-3958 SHEET 4 OF 4 SHEETS ,