Description
| Part Number | OR-233 |
| Direct Replacement For | American Granby HOR4, American Plumber 151231-51, OR-233; Ametek OR-233; Culligan 411310, OR-233; Pentek 151231, OR-233; US Filter OR-233; Watts WP113045 |
| Filter Housing Compatibility | Culligan SY-2000, SY-2100, SY-2300, SY-2300S, SY-2500, SY-2650, US-600, US-640, US-600A; ACE Hardware 4158622; American Granby HFHP75BSLBP, HFHP75BSLBP20, HFHP75CSLWP; American Plumber WLCS-1000, WRO-3000, WRO-3500; Pentek RO-3000, RO-3500; Pentek US-1000, US-1500; Watts WP-5, WP-4V |
| Inside Diameter | Approximately 2-7/8″ |
| Outside Diameter | Approximately 3-1/8″ |
| Cross Section (Thickness) | Approximately 1/8″ (0.14″ Actual) |
The OR-233 o-ring is compatible with the following filter models:
- ACE Hardware 4158622
- American Granby HFHP75BSLBP, HFHP75BSLBP20, HFHP75CSLWP
- American Plumber WLCS-1000, WRO-3000, WRO-3500
- Pentek RO-3000, RO-3500
- Culligan SY-2000, SY-2100, SY-2300, SY-2300S, SY-2500, SY-2650, US-600, US-640, US-600A
- Pentek US-1000, US-1500
- Watts WP-5, WP-4V
The OR-233 o-ring is a direct replacement for the following other part numbers:
- American Granby HOR4
- American Plumber 151231-51, OR-233
- Ametek OR-233
- Culligan 411310, OR-233
- Pentek 151231, OR-233
- US Filter OR-233
- Watts WP113045
Sizing/Dimensions:
The OR-233 o-ring measures approximately 2-7/8” inside diameter x 3-1/8” outside diameter x 1/8” thick (0.14″ actual thickness). Please confirm these exact dimensions or the OR-233 part number (or other part numbers listed above) required in your water system before purchasing.

![OR-233 O-Rings for Culligan US-600(A), SY-2000, SY-2300, SY-2500, SY-2650 Water Filter Housings (3 Pack) [Also called HOR4, 151231-51, 411310, 151231, WP113045]](https://www.diyhardwareshop.com/wp-content/uploads/2026/07/or-233-o-rings-culligan-us-600-sy-2000-sy-2300-sy-2500-sy-2650-water-filter-hous.webp)


