Backflow Repair Parts Catalog - SupplyHouse.com
MODEL 375, 475 & 475V
Lead-Free* Reduced Pressure Principle – Backflow Preventers 2-1/2" & 3" *This product contains a weighted average lead content less than 0.25% for wetted surfaces.
Item Number
Description
2-1/2"
3"
1
GATE VALVE, NRS GATE VALVE, OS&Y GATE VALVE, OS&Y (F&G) BOLT, FLANGE NUT, FLANGE GASKET, FLANGE O-RING, CONTROL UNIT RELIEF VALVE ASSY BOLT, RELIEF VALVE SEAT RETAINER #2 SEAT RETAINER #1 COVER COVER RETAINER ASSY BULKHEAD FITTING ASSY BALL VALVE COUPLING NIPPLE, LONG PLUG O-RING NUT, POPPET RETAINER HANDLE, #1 POPPET ASSY WASHER O-RING POPPET RETAINER SEAL RING SEAT ASSEMBLY, #1 POPPET SEAT ASSEMBLY, #2 POPPET #1 CHECK ASSEMBLY #2 CHECK ASSEMBLY BULKHEAD FITTING ASSY SENSING TUBE FITTING, CU COVER SENSING TUBE FITTING, BODY SENSING TUBE BALL VALVE BULKHEAD FITTING, GASKET GASKET, COVER RETAINER
212-48 212-48OSY 212-48OSYGXF 558-11D 558-9 557-13 032N 3707-CU-XL 554-11A 3507-14G 3507-14F 3507-3C 5-23 BHF1CXL-100 12-850XL 12-51 558-21B 558-7 245N 3507-9 3507-14E 3507-14D WK-111N 3507-14 3507-12 3707-180 3507-180A 3707-300 3507-300A BHF1BXL-100 5758A-36 3709-29 3707-36 12-850MXL BHF1-13 5-23-13
3-48 3-48OSY 3-48OSYGXF 558-11D 558-9 558-13 032N 3707-CU-XL 554-11A 3507-14G 3507-14F 3507-3C 5-23 BHF1CXL-100 12-850XL 12-51 558-21B 558-7 245N 3507-9 3507-14E 3507-14D WK-111N 3507-14 3507-12 3707-180 3507-180A 3707-300 3507-300A BHF1BXL-100 5758A-36 3709-29 3707-36 12-850MXL BHF1-13 5-23-13
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
Repair Kit RK212-350
Size 2-1/2, 3"
Part Number
Qty.
Description
3507-12
2
SEAL RING
245N
2
O-RING
WK-111N
2
O-RING
46
Rev. B
MODEL 375, 475 & 475V – 2-1/2" & 3" Parts Drawing
For more information please visit www.zurn.com
47
MODEL 375, 375A, 375AST, 475 & 475V Relief Valve – 2-1/2" to 10"
RELIEF VALVE COMPLETE Item Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14
3707-CU-XL
3711-CU-XL
Description
Qty.
2-1/2"-6"
Qty.
8" & 10"
BOLT, COVER O-RING UPPER PLUNGER DIAPHRAGM LOWER PLUNGER SEAL RING SEAL RETAINER SCREW CU SPRING CU SEAT O-RING WASHER STEM ASSY. O-RING
6 1 1 1 1 1 1 1 1 1 1 1 1 1
554-11A 222N 3707-34 3707-43 3707-34A 3707-12 3707-14 558-11E 3707-33A 3707-18 032N N/A 3707-50 032N
8 1 1 1 1 1 1 1 1 1 1 1 1 1
957-11 227N 3711-34 3711-43 3711-34A 3711-12 3711-14 558-11E 3711A-33 3711-18 146N 3707-14 3711-50 142N
Repair Kit, Rubber
Item Number 6 4 2 11 14
RK212-375R Size 2-1/2"- 6"
RK8-375R Size 8" & 10"
Description
Qty.
Part Number
Part Number
SEAL RING DIAPHRAGM O-RING O-RING O-RING
1 1 1 1 1
3707-12 3707-43 222N 032N 032N
3711-12 3711-43 227N 146N 142N
Repair Kit, Complete
Item Description Number N/A REPAIR KIT, RUBBER 9 SPRING
58
RK212-375 Size 2-1/2"- 6"
RK8-375 Size 8" & 10"
Qty.
Part Number
Part Number
1 1
RK212-375R 3707-33A
RK8-375R 3711A-33
Rev. C
Lead-Free* Reduced Pressure Principle – Backflow Preventers 2-1/2" & 3" *This product contains a weighted average lead content less than 0.25% for wetted surfaces.
Item Number
Description
2-1/2"
3"
1
GATE VALVE, NRS GATE VALVE, OS&Y GATE VALVE, OS&Y (F&G) BOLT, FLANGE NUT, FLANGE GASKET, FLANGE O-RING, CONTROL UNIT RELIEF VALVE ASSY BOLT, RELIEF VALVE SEAT RETAINER #2 SEAT RETAINER #1 COVER COVER RETAINER ASSY BULKHEAD FITTING ASSY BALL VALVE COUPLING NIPPLE, LONG PLUG O-RING NUT, POPPET RETAINER HANDLE, #1 POPPET ASSY WASHER O-RING POPPET RETAINER SEAL RING SEAT ASSEMBLY, #1 POPPET SEAT ASSEMBLY, #2 POPPET #1 CHECK ASSEMBLY #2 CHECK ASSEMBLY BULKHEAD FITTING ASSY SENSING TUBE FITTING, CU COVER SENSING TUBE FITTING, BODY SENSING TUBE BALL VALVE BULKHEAD FITTING, GASKET GASKET, COVER RETAINER
212-48 212-48OSY 212-48OSYGXF 558-11D 558-9 557-13 032N 3707-CU-XL 554-11A 3507-14G 3507-14F 3507-3C 5-23 BHF1CXL-100 12-850XL 12-51 558-21B 558-7 245N 3507-9 3507-14E 3507-14D WK-111N 3507-14 3507-12 3707-180 3507-180A 3707-300 3507-300A BHF1BXL-100 5758A-36 3709-29 3707-36 12-850MXL BHF1-13 5-23-13
3-48 3-48OSY 3-48OSYGXF 558-11D 558-9 558-13 032N 3707-CU-XL 554-11A 3507-14G 3507-14F 3507-3C 5-23 BHF1CXL-100 12-850XL 12-51 558-21B 558-7 245N 3507-9 3507-14E 3507-14D WK-111N 3507-14 3507-12 3707-180 3507-180A 3707-300 3507-300A BHF1BXL-100 5758A-36 3709-29 3707-36 12-850MXL BHF1-13 5-23-13
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
Repair Kit RK212-350
Size 2-1/2, 3"
Part Number
Qty.
Description
3507-12
2
SEAL RING
245N
2
O-RING
WK-111N
2
O-RING
46
Rev. B
MODEL 375, 475 & 475V – 2-1/2" & 3" Parts Drawing
For more information please visit www.zurn.com
47
MODEL 375, 375A, 375AST, 475 & 475V Relief Valve – 2-1/2" to 10"
RELIEF VALVE COMPLETE Item Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14
3707-CU-XL
3711-CU-XL
Description
Qty.
2-1/2"-6"
Qty.
8" & 10"
BOLT, COVER O-RING UPPER PLUNGER DIAPHRAGM LOWER PLUNGER SEAL RING SEAL RETAINER SCREW CU SPRING CU SEAT O-RING WASHER STEM ASSY. O-RING
6 1 1 1 1 1 1 1 1 1 1 1 1 1
554-11A 222N 3707-34 3707-43 3707-34A 3707-12 3707-14 558-11E 3707-33A 3707-18 032N N/A 3707-50 032N
8 1 1 1 1 1 1 1 1 1 1 1 1 1
957-11 227N 3711-34 3711-43 3711-34A 3711-12 3711-14 558-11E 3711A-33 3711-18 146N 3707-14 3711-50 142N
Repair Kit, Rubber
Item Number 6 4 2 11 14
RK212-375R Size 2-1/2"- 6"
RK8-375R Size 8" & 10"
Description
Qty.
Part Number
Part Number
SEAL RING DIAPHRAGM O-RING O-RING O-RING
1 1 1 1 1
3707-12 3707-43 222N 032N 032N
3711-12 3711-43 227N 146N 142N
Repair Kit, Complete
Item Description Number N/A REPAIR KIT, RUBBER 9 SPRING
58
RK212-375 Size 2-1/2"- 6"
RK8-375 Size 8" & 10"
Qty.
Part Number
Part Number
1 1
RK212-375R 3707-33A
RK8-375R 3711A-33
Rev. C
