Replacement Parts List

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18
MODEL 350A & 350
Lead-Free Double Check
Backow Preventers 350A (2 1/2” to 10”) & 350 (4” to 12”)
*This product contains a weighted average lead content less than 0.25% for wetted surfaces.
ITEM
NO.
DESCRIPTION 2 1/2” 3” 4” 6” 8” 10” 12”
1 GATE VALVE, NRS 212-48GXF 3-48GXF 4-48 6-48 8-48 10-48 12IN-48
GATE VALVE, OS&Y 212-48OSYGXF 3-48OSYGXF 4-48OSY 6-48OSY 8-48OSY 10-48OSY 12IN-48OSY
GATE VALVE, OS&Y (F&G) 212-48OSYGXF 3-48OSYGXF 4-48OSYGXF 6-48OSYGXF 8-48OSYGXF 10-48OSYGXF 12IN-48OSYGXF
BUTTERFLY VALVE 212-49GVIC 3-49GVIC 4-49GVIC 6-49GVIC 8-49GVIC 10-49GVIC N/A
2 BOLT, FLANGE N/A N/A 559-11 5510-11 9511-11B 9512-11B 9512-11B
3 NUT, FLANGE N/A N/A 558-9 5510-9 5510-9 9512-9A 9512-9A
4 GASKET, FLANGE N/A N/A 559-13 5510-13 9511-13 9512-13 9512-13
5 O-RING, COVER PLATE 031N 031N 031N 031N 142N 142N 142N
6 COVER PLATE 558-3AXL-010F 558-3AXL-010F 558-3AXL-010F 558-3AXL-010F 3511-3AXL-010F 3511-3AXL-010F 3511-3AXL-010F
7 BOLT, COVER PLATE 554-11A 554-11A 554-11A 554-11A 957-11 957-11 957-11
8 SEAT RETAINER #2 3509-140 3509-140 3509-140 3510-140 3511-14DSS 3511-14DSS 3511-14DSS
9 SEAT RETAINER #1 3509-14B 3509-14B 3509-14B 3510-14B 3511-9 (NUT) 3511-9 (NUT) 3511-9 (NUT)
10 COVER 3509-3C 3509-3C 3509-3C 3510-3C 3511-3C 3511-3C 3511-3C
11 COVER RETAINER ASSY 6-23 6-23 6-23 8-23 12-23 12-23 12-23
12 BULKHEAD FITTING ASSY BHF1CXL-100 BHF1CXL-100 BHF1CXL-100 BHF2BXL-100 BHF2BXL-100 BHF2BXL-100 BHF2BXL-100
13 BALL VALVE 12-850XL 12-850XL 12-850XL 34-850XL 34-850XL 34-850XL 34-850XL
14 COUPLING 12-51 12-51 12-51 557-51 557-51 557-51 557-51
15 NIPPLE, LONG 558-21B 558-21B 558-21B 34X3-21B 34X3-21B 34X3-21B 34X3-21B
16 O-RING 353N 353N 353N 364N 273N 273N 273N
17 PLUG 558-7 558-7 558-7 5510-7 5510-7 5510-7 5510-7
18 BOLT, POPPET RETAINER 558-11E 558-11E 558-11E 5510-11A 3511-11 3511-11 3511-11
19 HANDLE, #1 POPPET ASSY 3509-6 3509-6 3509-6 3510-6 N/A N/A N/A
20 WASHER 3509-14C 3509-14C 3509-14C 3510-14C 3510-14C 3510-14C 3510-14C
21 O-RING WK-109N WK-109N WK-109N 204N 204N 204N 204N
22 POPPET RETAINER 3509-14 3509-14 3509-14 3510-14 3511-14 3511-14 3511-14
23 SEAL RING 3509-12 3509-12 3509-12 3510-12 3511-12 3511-12 3511-12
24 SEAT ASSEMBLY, #1 POPPET 3509-180 3509-180 3509-180 3510-180 3512-180A 3512-180A 3512-180A
25 SEAT ASSEMBLY, #2 POPPET 3509-180 3509-180 3509-180 3510-180 3512-180B 3512-180B 3512-180B
26 #1 CHECK ASSEMBLY 3509-300A 3509-300A 3509-300A 3510-300A 3512-300A 3512-300A 3512-300A
27 #2 CHECK ASSEMBLY 3509-300B 3509-300B 3509-300B 3510-300B 3512-300B 3512-300B 3512-300B
28 BULKHEAD FITTING ASSY BHF1BXL-100 BHF1BXL-100 BHF1BXL-100 BHF1BXL-100 BHF2CXL-100 BHF2CXL-100 BHF2CXL-100
29 PLUG 558-7 558-7 558-7 558-7 558-7 558-7 558-7
30 BALL VALVE 12-850MXL 12-850MXL 12-850MXL 34-850XL 34-850XL 34-850XL 34-850XL
31 NIPPLE, LONG N/A N/A N/A 5510-21B 5510-21B 5510-21B 5510-21B
32 LIFTING LUG N/A N/A N/A 9510-24 9510-24 N/A N/A
33 GASKET, COVER RETAINER 6-23-13 6-23-13 6-23-13 8-23-13 12-23-13 12-23-13 12-23-13
34 WASHER N/A N/A N/A N/A 3511-14E 3511-14E 3511-14E
35 BULKHEAD FITTING, GASKET BHF1-13 BHF1-13 BHF1-13 BHF1-13 BHF1-13 BHF1-13 BHF1-13
36 GROOVED COUPLING 4X212-23 4X3-23 4-23 6-23 8-23 10-23 N/A
37 GASKET N/A N/A 4-23-13 6-23-13 8-23-13 10-23-13 N/A
RK4-350
REPAIR KIT
MODEL 350 4"
MODEL 350A, 2 1/2", 3", 4”
RK6-350
REPAIR KIT
MODEL 350 & 350A, 6”
RK8-350
REPAIR KIT
MODEL 350 8", 10", 12"
MODEL 350A, 8”, 10”
PART NO. QTY. DESCRIPTION PART NO. QTY. DESCRIPTION PART NO. QTY. DESCRIPTION
3509-12 2 SEAL RING 3510-12 2 SEAL RING 3511-12 2 SEAL RING
353N 2 O-RING 364N 2 O-RING 273N 2 O-RING
WK-109N 8 O-RING 204N 8 O-RING 204N 12 O-RING
REPAIR KITS