Overview of Primary Product

Page 2 of 2
WILKINS a Zurn company, 1747 Commerce Way, Paso Robles, CA 93446 Phone:[phone] Fax:[phone]
IN CANADA: ZURN INDUSTRIES LIMITED, 3544 Nashua Dr., Mississauga, Ontario L4V 1L2 Phone:[phone] Fax:[phone]
Product Support Help Line: 877-BACKFLOW (877-222-5356)
• Website: http://www.zurn.com
TYPICAL INSTALLATION
Local codes shall govern installation requirements. To be
installed in accordance with the manufacturers’ instructions
and the latest edition of the Uniform Plumbing Code. Unless
otherwisespecied,theassemblyshallbemountedata
minimum of 12” (305mm) and a maximum of 30” (762mm)
aboveadequate drainswith sufcientside clearancefor
testing and maintenance. The installation shall be made
so that no part of the unit can be submerged.
OUTDOOR INSTALLATION
INDOOR INSTALLATION
SPECIFICATIONS
TheReducedPressurePrincipleBackowPreventershallbeASSE®Listed1013,ratedto180°Fandsuppliedwithfull
port ball valves. The main body shall be Nylon and the seat disc elastomers shall be silicone. If installed indoors, the
installationshallbesuppliedwithanairgapadapter.TheReducedPressurePrincipleBackowPreventershallbea
WILKINS Model 375.
INLET SHUT OFF
DIRECTION OF FLOW
30" MAX.
12" MIN.
PROTECTIVE
ENCLOSURE
AIR GAP
OPTIONAL
WATER METER
175 PSIG 180ß F
3/4" 375 RP
ZURN
WILKINS
FLOOR
DRAIN
MODEL 375SAG
(SHOWN)
OPTIONAL STRAINER
(MODEL S)
WILKINS
Capacity thru Schedule 40 Pipe
Pipe size 5 ft/sec 7.5 ft/sec 10 ft/sec 15 ft/sec
3/8" 3 4 6 9
1/2" 5 7 9 14
3/4" 8 12 17 25
1" 13 20 27 40
1 1/4" 23 35 47 70
1 1/2" 32 48 63 95
2" 52 78 105 167
 Rated Flow (Established by approval agencies)
30" MAX.
12" MIN.
FLOOR DRAIN
175 PSIG 180° F
ZURN
/ WILKINS
375 RP
B64.4
1013
DIRECTION OF FLOW
2
(1/2” - 1”) 5 1/2
(1-1/4” - 2”) 8 1/8
(1/2” - 1”) 2” PIPE
(1-1/4” - 2”) 3” PIPE
(DRAIN LINE CAN
BE ANY STANDARD
PIPING MATERIAL)
MODEL 375, 375XL 1-1/4" - 2" (STANDARD & METRIC)
5
10
15
20
0 50 100 150 200 250
FLOW RATES (GPM)
PRESSURE LOSS (PSIG)
34
69
103
138
0.0 3.2 6.3 9.5 12.6 15.8
FLOW RATES (l/s)
PRESSURE LOSS (kpa)
MODEL 375, 375XL 1/2", 3/4" & 1" (STANDARD & METRIC)
0
10
20
30
0 20 40 60 80
FLOW RATES (GPM)
PRESSURE LOSS (PSIG)
0
69
138
207
0.0 1.3 2.5 3.8 5.0
FLOW RATES (l/s)
PRESSURE LOSS (kpa)
FLOW CHARACTERISTICS
2" (50mm)
1-1/4" (32mm)
1-1/2" (40mm)
1/2" (15mm)
1" (25mm)
3/4" (20mm)