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THIS DIMENSION PER APPROVED PLANS
LOS ANGELES COUNTY WATERWORKS DISTRICTS
DEPARTMENT OF PUBLIC WORKS
APPROVED
,
ASSIST
EP-
DIRE
OR
APRIL 2004
DATE
STANDARD PLAN
VV-6
SHEET 1 OF 2
BACKFLOVV PREVENTION DETECTOR ASSEMBLY (CONTINUED)
LIST OF MATERIALS:
0 BACICFLOW PROTECTION ASSEMBLY FROM THE DISTRICT'S APPROVED LIST.
LEVEL OF PROTECTION
SHALL BE DETERMINED BY THE DISTRICT AND IS DEPENDENT ON THE TYPE OF WATER USE
ON-SITE.
0
VICTAUUC NIPPLE, GROOVED END x FLANGED END, STEEL SCHEDULE 40, CLASS 150 FLANGE
(6* LONG EACH), EPDXY LINED.
0
VICTAUUC COUPLING STYLE NO. 77 OR OTHER DISTRICT APPROVED COUPLING FOR GROOVEDEND PIPE.
0
SUP-ON WELDING FLANGE, CLASS 150.
0
STEEL PIPE SCHEDULE 40, CML a cmc.
0
90* FLANGED ELBOW; STEEL SCHEDULE 40, CLASS 150 FLANGE, CML
0
CONCRETE THRUST BLOCK, PER STANDARD PLAN W-21.
0
90* FLANGED ELBOW; STEEL SCHEDULE 40, CLASS 150 FLANGE, CML
0
INSULATING GASKET KIT WITH BOLT SLEEVES FOR CLASS 150 FLANGE.
S
ADJUSTABLE PIPE SUPPORT PER STANDARD PLAN W-17. CONCRETE PIER REQUIRED FOR
ASSEMBLIES INSTALLED WITHOUT CONCRETE SLAB.
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& CMC.
CONCRETE SLAB: 4 INCH MINIMUM THICKNESS, TYPE 520-C-2500 CONCRETE WITH 6-6-10-10 WIRE
MESH PLACED AT 1/3 FROM THE BASE OF THE SLAB. SLAB SHALL BE SLOPED TO DRAIN TO THE
STREET AND HAVE A UGHT BROOM FINISH.
CONCRETE BLOCK ENCLOSURE OR OTHER ENCLOSURE/SCREEN AS REQUIRED AND APPROVED BY
THE LOCAL AGENCY. THE DISTRICT RESERVES THE RIGHT TO REQUIRE AN ENCLOSURE EVEN
IF NOT REQUIRED BY THE PERMITTING AGENCY. SEE NOTE 5.
NOTES:
1. SIZES AS REQUIRED BY THE PLANS AND/OR SPECIFICATIONS.
2. ALL MATERIALS SHALL COMPLY WITH THE SPECIFICATIONS AND/OR *GRIEENBOOr, AS APPLICABLE.
GENERAL NOTES:
1.
THE BACKFLOW PREVENTION ASSEMBLY MUST BE ON THE DISTRICTS CURRENT LIST OF APPROVED
BACKFLOW PREVENTION ASSEMBLIES. WATER SERVICE SHALL BE CONTINGENT UPON TESTING AND
CERTIFICATION OF THE ASSEMBLY BY A LOS ANGELES COUNTY CERTIFIED BACKFLOW TESTER.
SUBSEQUENT TO THE INMAL CERTIFICATION, THE PROPERTY OWNER SHALL BE RESPONSIBLE FOR
SUBMITTING AN ANNUAL TEST CERTIFICATION TO THE DISTRICT. ALL TESTING PROCEDURES AND
CERTIFICATION SHALL BE CONDUCTED AT OWNERS EXPENSE.
2.
BYPASS METER SHALL BE COMPATIBLE WITH THE DISTRICTS AUTOMATED METER READING (AMR) SYSTEM. FOR DETAILS,
SEE METER SPECS ISSUED AT TIME OF APPLICATION FOR WATER SERVICE.IF AN ENCLOSURE IS TO BE
CONSTRUCTED AROUND THE DETECTOR ASSEMBLY, THEN THE BYPASS METER SHALL BE PLACED ON
THE SIDE OF THE DEVICE THAT IS CLOSEST TO TFIE ENTRANCE THROUGH THE ENCLOSURE.
3.
ALL ABOVEGROUND PIPING, VALVES, AND FITTINGS SHALL. BE PAINTED WITH TWO (2) COATS OF
DISTRICT APPROVED HEAVY-DUTY RED PRIMER, AND TWO (2) COATS OF DISTRICT APPROVED DUNES
TAN OR FOREST GREEN.
4.
THE CONTRACTOR AND/OR OWNER IS RESPONSIBLE FOR INSTALLING AND MAINTAINING INSULATION ON
ALL ABOVEGROUND PIPING AND FITTINGS IN AREAS SUBJECT TO FREEZING. THE INSULATION MUST
NOT INTERFERE WITH ACCESS TO OR READING OF THE BYPASS METER.
5.
IF THE BACKFLOW PREVENTION ASSEMBLY IS TO BE ENCLOSED/SCREENED, THEN THE ENCLOSURE/
SCREEN MUST MEET THE FOLLOWING CRITERIA:
k THE CLEARANCE BETWEEN THE ENCLOSURE/SCREEN AND THE ASSEMBLY SHALL BE NO LESS THAN 2 FEET.
B. IF A RETAINING WALL IS NECESSARY, IT SHALL BE LOCATED OUTSIDE OF THE DISTRICT EASEMENT.
C. THE PROPERTY OWNER SHALL BE RESPONSIBLE FOR THE MAINTENANCE OF ANY ENCLOSURE/SCREEN.
D. THE ENCLOSURE/SCREEN SHALL BE CONSTRUCTED TO ALLOW UNRESTRICTED DRAINAGE TO THE STREET.
5.
THE BOLTS AND NUTS CALLED FOR ABOVEGROUND SHALL BE 94' COATED SLUE' BOLTS.
LOS ANGELES COUNTY WATERWORKS DISTRICTS
DEPARTMENT OF PUBLIC WORKS
APPROVED
ASSIST
e
IFtEiCiet
APRIL 2004
DATE
STANDARD PLAN
W-6
SHEET 2 OF 2