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CITY OWNED '
AND MAINTAINED 1
L
PRIVATELY OWNED AND MAINTAINED
MAXIMUM PIPE LENGTH FROM PROPERTY LINE
TO DDCVA MUST NOT EXCEED 50 FEET
®� 4 CONCRETE BOLLARDS
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5 FT. MAX.
13 12
1- MAIN LINE TEE (MJ x FL) WITH CONCRETE BLOCKING
(WATER MAIN LOCATED IN EASEMENT ON PRIVATE PROPERTY �40
SHALL NOT BE MORE THAN 50 FEET TO BUILDING)
2- BRANCH VALVE (FL x MJ) WITH VALVE BOX AND COVER
3- CLASS 52 DUCTILE IRON PIPE (4 INCH MINIMUM)
ALL PIPE AND FITTINGS SHALL BE RESTRAINED WITH SHACKLE RODS
AND CONCRETE THRUST BLOCKS PER NFPA AND AWWA STANDARDS.
4- POST -INDICATOR VALVE (MJ) WITH TAMPER SWITCH
5- 2-90' BENDS (FL x FL) WITH FLANGED DUCTILE IRON PIPE SPOOL
6- 18" LONG SPOOL (FL x PE)
7- FLANGE COUPLING ADAPTOR
8- APPROVED DDCVA ON MAIN LINE IN HORIZONTAL POSITION ONLY.
(PER LATEST DEPT. OF HEALTH APPROVED LIST OF BACKFLOW PREVENTION DEVICES)
BOTTOM OF DDCVA SHALL BE A MINIMUM OF 24 INCH ABOVE FLOOR LEVEL AND
NOT HIGHER THAN 3 FEET MAXIMUM. INSTALL 3 CONCRETE PADS OR ADJUSTABLE PIPE
SUPPORT COLUMNS UNDER DDCVA
9- O.S & Y VALVES TO BE RESILIENT SEATED WITH TAMPER SWITCHES.
ADD WIRING IN ACCORDANCE WITH L & I
10- METERED 3/4 INCH BY-PASS DCVA - BY-PASS METER SHALL BE A 3/4 INCH
"SENSUS-ECR" SR POSITIVE DISPLACEMENT METER EQUIPPED WITH A REMOTE
READ SENSOR PLATE MOUNTED ON THE OUTSIDE OF THE BUILDING WALL.
11- SWING TYPE GRAVITY CHECK VALVE, FLANGE WITH BALL DRIP IN VAULT
12- 4"x 4" x 6" BULL, ELBOW, THREADED
13- UL LISTED FIRE DEPT. CONNECTION, UL LISTED BREAK AWAY CAPS, LOCATE WITHIN
50 FEET MAXIMUM OF A PUBLIC FIRE HYDRANT.
AFTER FIELD INSTALLATION, MAIN DDCVA AND BY-PASS DCVA MUST BE TESTED
SATISFACTORILY BY A DEPARTMENT OF HEALTH CERTIFIED BACKFLOW ASSEMBLY
TESTER. TEST REPORT MUST BE SUBMITTED TO CITY OF RENTON WATER UTILITY
ENGINEERING DEPARTMENT PRIOR TO ACTIVATION OF NEW LINE.
INSTALL BRASS PLUGS AT ALL TEST COCKS.
4 1
BUILDING WALL
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PERIMETERS OF MINIMUM CLEARANCES TO BE
PAINTED ON FLOOR IN WHITE ENAMEL PAINT
STRIPE, WITH 2 INCH STENCILED BLACK LETTERS
TO SAY: "DO NOT BLOCK ACCESS"
DDCVA MUST BE INSTALLED IMMEDIATELY AFTER
PIPE PENETRATION THROUGH BUILDING FLOOR SLAB.
ROOM IN WHICH DDCVA IS LOCATED SHALL:
A. HAVE FLOOR DRAIN CONNECTED TO THE SANITARY SEWER SYSTEM.
B. HAVE A HEATING SYSTEM (40' F MIN. TEMP.) NO HEAT TAPE
C. NOT BE USED FOR STORAGE AROUND THE DDCVA
D. HAVE CLEARLY DELINEATED ACCESS WAYS TO DDCVA AND PIVs.
A RIGHT -OF -ENTRY AGREEMENT MUST BE GRANTED TO THE
CITY OF RENTON FOR INSPECTION OF THE DDCVA
AND METER.
SEPARATE FIRE SPRINKLER PLANS INCLUDING INSTALLATION OF DDCVA
MUST BE SUBMITTED TO RENTON FIRE PREVENTION DEPARTMENT FOR
REVIEW AND APPROVAL.
A SEPARATE FIRE SPRINKLER PERMIST IS REQUIRED.
24 INCH MINIMUI
36 INCH MAXIMU
FINISH FLOOR LEVEL
ELEVATION VIEW OF DDCVA
INSIDE BUILDING INSTALLATION FOR
3 INCH AND LARGER
DETECTOR DOUBLE CHECK VALVE ASSEMBLY
DWG. NAM E: .
CITY OF RENTON
STANDARD PLANS
LST DATE:.
SP PAGE:.
FLOW DIFFUSER
BAFFLE
—6", SEE SITE PLAN
CONTRACTOR SHALL
ADJUST THIS DIMENSION
BY INSTALLING SPACER
BETWEEN VAULT & TOP
4" CLEANOUT
�. 3' —0"
NOTES:
1. CONNECTIONS TO CONCRETE WALLS WITH P.V.C. PIPE REQUIRE
KOR-N-SEAL CONNECTOR OR A.C. X P.V.C. BRANT ADAPTOR SEAL
ALL PIPE CONNECTIPONS WITH NONSHRINK GROUT. FLEX COUPLINGS
SHALL BE EQUAL TO INDIANA SEAL #156-66 OR FERNO #1056-66.
2. OW-1 COVER, ACCESS DOOR & INSP. COVER SHALL
BE HS-20 RATED + 30% IMPACT. ALL FASTENERS SHALL
BE 316 STAINLESS STEEL.
3. CONTRACTOR SHALL FILL SYSTEM W/ WATER
PRIOR TO SERVICE.
4. PROVIDE SAMPLING TEE AS SHOWN.
5. PROVIDE MIN. 2 SQ. FT. FREE OPENING @ INLET
SECTION OF SAND/WATER INTERCEPTOR &
MIN. 24" FROM OUTLET INVERT TO BOTTOM OF UNIT.
3" V TO ROOF
TOP, ACCESS DOOR &
INSPECTION COVERS.
WATER LEVEL
OW-1
FIN. GRADE _
FLOW DIRECTION
3" V TO ROOF, SEE PLAN
VENT CONNECTIONS
TO ATMOSPHERE
" NON-SKID STL. COVER
&3"
FLEX. COUPLING o- — — � —
�nP') I. E: 352.60'
448 ../NLETGALLON
6" OUTLETSI.E: 352.00'
716
. E: 352.50' 4 »
2"xi" STAINLESS REDUCER
STEEL CLAMP W/ FLOW DIFFUSER
�p.
S.S. BOLTSBAFFLE
OF 2 EA. END)
W-1 OIL / WATER
18" MIN. SEPARATOR
TRAP SEAL PRECAST CONCRETE VAULT, 6'-0"X4'-0"X3'-4\"
UTILITY VAULT CO. INC. # 660-SA OR EQUAL.
INSPECTION & ELEV:
SAMPLING TEE 348.62'
GRIT/SLUDGE WATER VOLUMN (VERIFY)
RETAINER = 60 CU. FT. OR
WEIR 448 GAL BAY DRAIN SCHEMATIC
N.T.S.
NOTES:
SIZING CRITERIA FOR OIL
1. WASTE WATER SOURCE: 7 VEHICLE BAYS W/2 HOSE BIBBS ® 15 GPM EACH
= 30 GPM (MAX.).
2. VEHICLES/HOUR WASHED : ASSUME 3 VEHICLES/HOUR.
3. SEPARATOR RETENTION TIME: 2 HOURS.
4. STORAGE FACTOR: 1.5.
SIZING FORMULA:
VEHIC./HR. X FLOW RATE X RETEN. TIME X STOR. FACTOR'=SIZE (MINIMUM LIQUID CAPACITY.)
3 X 30 X 2 X 1.5'=270 GAL. (MINIMUM LIQUID CAPACITY).
Wlmb3W602
RECOMMENDED FOR APPROVAL
BY: Date:
BY: Date:
/ FLOOR
ELEV:
356.50'
4" TO FLOOR DRAINS.
I.E: 352.60'
6" MIN. WTR. SEAL
BAFFLES
SW1 SAND / WATER
SEPARATOR
CAPACITY: 365 GAL.
W/ 49 CU. FT. HOLDING
CAPACITY.
3/ 2
0
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BY: Date:
BY: Cr_OIV iv. MDR 2 8 4003 Date: