AO-WH-LG-OR (also called PS-WHL-ORG, 1074315, or 5225369) - O-Ring measures approximately 5.48” Inside Diameter and 0.165” Thickness (approximately 14cm ID). Compatible with A.O. Smith AO-WH-PREL and Lowes Project Source PS-WHL-H whole house water filter housings. Often referred to as “Large 4.5” O-Ring” because it is compatible with the AO Smith AO-WH-PREL filter housing that uses 4.5 inch wide filter cartridges. Not compatible with the smaller “standard” AO Smith or Project Source housings that use 2.5 inch filter cartridges. Includes three (3) o-rings (also called gaskets or seals). An exact match to the o-ring that came in your filter housing when it was new. Molded from NSF 61 certified buna-n rubber for safe and clean drinking water. Manufactured and warrantied by Captain O-Ring LLC. Proudly assembled in the USA! Get your leaking filter housing back in working order with Captain O-Ring’s replacement AO-WH-LG-OR o-rings (also called PS-WHL-ORG, #1074315, or #5225369).

The AO-WH-LG-OR is often referred to as “Large 4.5” O-Ring” by the manufacturer because it is compatible with the AO Smith AO-WH-PREL and Lowes Project Source PS-WHL-H filter housings that uses 4.5 inch wide filter cartridges. This o-ring size is not compatible with the smaller “standard” AO Smith housings that use 2.5 inch filter cartridges.

Package includes three (3) o-rings. Replace your leaking o-ring and have spares on hand for the future with this handy 3-pack. OEM spec Buna-N rubber for long lasting performance and reliability. An exact match to the o-ring that came in your filter housing when it was new.

Molded from NSF 61 certified buna-n rubber for safe and clean drinking water. Manufactured and warrantied by Captain O-Ring LLC. Proudly assembled in the USA!