This fits your .
The Pentek 151231-27 (also called sh143330) O-Ring for 3/8" Slimline Filter Housings is commonly used with filter models: US-600(A), SY-2000, SY-2300, SY-2300S, SY-2500, SY-2650, RO-3000, RO-3500, ACE 4158622(A), WRO-3000, WRO-3500, and WLCS-1000. The o-ring has an approximate diameter of 3". Purchase this part if your unit calls for part number 151231-27 or sh143330.
What to expect:
This item includes three (3) o-rings in a resealable zip-top poly bag with "Captain O-Ring" branded packaging.
Manufactured and warrantied against defect for one year by Captain O-Ring LLC. "Captain O-Ring" is a registered trademark of Captain O-Ring LLC.
Captain O-ring - Pentek 151231-27 (sh143330) Replacement Water Filter ORing for 3/8" Slimline Housings (3 Pack) - B077ZH4TPP