IPW Industries Inc. O-Rings for Pentek 151121 / OR-38 Water Filter Housing Gasket Seal
O-Rings for Pentek 151121 / OR-38 Water Filter Housing Gasket Seal
Universal replacement o-ring for 3.5" diameter slim line filter housings. Fits Pentek, Culligan, Ametek, and American Plumber systems.
Precision Engineered Seal
| Outer Diameter | 3-1/2 inches |
| Inner Diameter | 3-1/4 inches |
| Cross Section | 1/8 inch |
| Quantity | 3 pack |
| Material | Food-grade elastomer |
Built for Leak-Free Performance
Reliable Seal
Precision-molded dimensions ensure a tight, leak-proof fit between housing cap and sump on 3.5" diameter systems.
Universal Compatibility
Direct replacement for Pentek 151121, Culligan OR-38, American Plumber W38-OR, Ametek 151121, and Campbell 10800-034.
Durable Construction
Food-grade elastomer material resists degradation from chlorine, sediment, and temperature fluctuations in residential water systems.
Cost-Effective Maintenance
Replace worn o-rings during filter changes to prevent leaks and extend housing lifespan. Three-pack provides spares for future maintenance.
Fits Multiple Housing Systems
Pentek: #5 and #10 Slim Line Housings, 3/8" Inlet/Outlet Slim Line Housings, 3G Housings, CSL-CIK, CCF-201, CTR-CMR-10, PSCL-C2, US-560, US-560K, SY-5167, SY-5197
American Plumber: WLCS-500, WRO-3167, W38-OR, 152031
Culligan: RVF-10, US-316, US-550, OR-38
Campbell: 1PS, 1PC, 2PS, 2PC, 1PSB, 1PCB, 2PSB, 2PCB, 1PSB1, 1PCB1, 2PSB1, 2PCB1, 10800-034
US Filter: RO-2127, RO-2300, RO-2300-A, RO-3167
Ace Hardware: 45335, 45449, 48166, 49562, 4001699, 4158515
GE: KWGE25RG (WS03X10038)
Ametek: 151121, AO-WH-STD-OR-2
Replacement Schedule
Inspect O-Ring
Check for cracks, flattening, or loss of elasticity each time you replace your filter cartridge. Replace if compression set is visible.
Preventive Replacement
Replace o-ring during routine filter changes to prevent surprise leaks. Maintain spare o-rings for emergency repairs.
At First Sign of Leak
If water seeps from housing cap during operation, shut off water supply and replace o-ring. Clean sealing surfaces before reinstalling.
Three-Pack Value
Keep spares on hand for routine maintenance and emergency repairs across multiple filter housings.
Simple Installation
Drop-in replacement requires no special tools. Clean housing groove, seat new o-ring, and hand-tighten cap.
Proven Cross-Reference
Direct match for OEM part numbers across Pentek, Culligan, Ametek, and American Plumber systems.
O-Rings for Pentek 151121 / OR-38 Water Filter Housing Gasket Seal
Universal replacement o-ring for 3.5" diameter slim line filter housings. Fits Pentek, Culligan, Ametek, and American Plumber systems.
Precision Engineered Seal
| Outer Diameter | 3-1/2 inches |
| Inner Diameter | 3-1/4 inches |
| Cross Section | 1/8 inch |
| Quantity | 3 pack |
| Material | Food-grade elastomer |
Built for Leak-Free Performance
Reliable Seal
Precision-molded dimensions ensure a tight, leak-proof fit between housing cap and sump on 3.5" diameter systems.
Universal Compatibility
Direct replacement for Pentek 151121, Culligan OR-38, American Plumber W38-OR, Ametek 151121, and Campbell 10800-034.
Durable Construction
Food-grade elastomer material resists degradation from chlorine, sediment, and temperature fluctuations in residential water systems.
Cost-Effective Maintenance
Replace worn o-rings during filter changes to prevent leaks and extend housing lifespan. Three-pack provides spares for future maintenance.
Fits Multiple Housing Systems
Pentek: #5 and #10 Slim Line Housings, 3/8" Inlet/Outlet Slim Line Housings, 3G Housings, CSL-CIK, CCF-201, CTR-CMR-10, PSCL-C2, US-560, US-560K, SY-5167, SY-5197
American Plumber: WLCS-500, WRO-3167, W38-OR, 152031
Culligan: RVF-10, US-316, US-550, OR-38
Campbell: 1PS, 1PC, 2PS, 2PC, 1PSB, 1PCB, 2PSB, 2PCB, 1PSB1, 1PCB1, 2PSB1, 2PCB1, 10800-034
US Filter: RO-2127, RO-2300, RO-2300-A, RO-3167
Ace Hardware: 45335, 45449, 48166, 49562, 4001699, 4158515
GE: KWGE25RG (WS03X10038)
Ametek: 151121, AO-WH-STD-OR-2
Replacement Schedule
Inspect O-Ring
Check for cracks, flattening, or loss of elasticity each time you replace your filter cartridge. Replace if compression set is visible.
Preventive Replacement
Replace o-ring during routine filter changes to prevent surprise leaks. Maintain spare o-rings for emergency repairs.
At First Sign of Leak
If water seeps from housing cap during operation, shut off water supply and replace o-ring. Clean sealing surfaces before reinstalling.
Three-Pack Value
Keep spares on hand for routine maintenance and emergency repairs across multiple filter housings.
Simple Installation
Drop-in replacement requires no special tools. Clean housing groove, seat new o-ring, and hand-tighten cap.
Proven Cross-Reference
Direct match for OEM part numbers across Pentek, Culligan, Ametek, and American Plumber systems.
Original: $3.99
-65%$3.99
$1.40Description
O-Rings for Pentek 151121 / OR-38 Water Filter Housing Gasket Seal
Universal replacement o-ring for 3.5" diameter slim line filter housings. Fits Pentek, Culligan, Ametek, and American Plumber systems.
Precision Engineered Seal
| Outer Diameter | 3-1/2 inches |
| Inner Diameter | 3-1/4 inches |
| Cross Section | 1/8 inch |
| Quantity | 3 pack |
| Material | Food-grade elastomer |
Built for Leak-Free Performance
Reliable Seal
Precision-molded dimensions ensure a tight, leak-proof fit between housing cap and sump on 3.5" diameter systems.
Universal Compatibility
Direct replacement for Pentek 151121, Culligan OR-38, American Plumber W38-OR, Ametek 151121, and Campbell 10800-034.
Durable Construction
Food-grade elastomer material resists degradation from chlorine, sediment, and temperature fluctuations in residential water systems.
Cost-Effective Maintenance
Replace worn o-rings during filter changes to prevent leaks and extend housing lifespan. Three-pack provides spares for future maintenance.
Fits Multiple Housing Systems
Pentek: #5 and #10 Slim Line Housings, 3/8" Inlet/Outlet Slim Line Housings, 3G Housings, CSL-CIK, CCF-201, CTR-CMR-10, PSCL-C2, US-560, US-560K, SY-5167, SY-5197
American Plumber: WLCS-500, WRO-3167, W38-OR, 152031
Culligan: RVF-10, US-316, US-550, OR-38
Campbell: 1PS, 1PC, 2PS, 2PC, 1PSB, 1PCB, 2PSB, 2PCB, 1PSB1, 1PCB1, 2PSB1, 2PCB1, 10800-034
US Filter: RO-2127, RO-2300, RO-2300-A, RO-3167
Ace Hardware: 45335, 45449, 48166, 49562, 4001699, 4158515
GE: KWGE25RG (WS03X10038)
Ametek: 151121, AO-WH-STD-OR-2
Replacement Schedule
Inspect O-Ring
Check for cracks, flattening, or loss of elasticity each time you replace your filter cartridge. Replace if compression set is visible.
Preventive Replacement
Replace o-ring during routine filter changes to prevent surprise leaks. Maintain spare o-rings for emergency repairs.
At First Sign of Leak
If water seeps from housing cap during operation, shut off water supply and replace o-ring. Clean sealing surfaces before reinstalling.
Three-Pack Value
Keep spares on hand for routine maintenance and emergency repairs across multiple filter housings.
Simple Installation
Drop-in replacement requires no special tools. Clean housing groove, seat new o-ring, and hand-tighten cap.
Proven Cross-Reference
Direct match for OEM part numbers across Pentek, Culligan, Ametek, and American Plumber systems.
