Fleck (12281) O-Ring, Top of Tank; 3-1/8" ID, 3-1/2" OD, 3/16" Width Pentek (151254) Big White & Big Clear Filter Housing O-Rings; Aquapure; Aqua-Pure aligning all bolt holes with

aligning all bolt holes with the pump base and frame structure

making the NCP-20BB ideal for both chlorinated municipal water and non-chlorinated well systems where cellulose filters fail

Dimensions 15" length x 4" diameter

This is the factory-correct component for systems where water flows upward through the media during service cycles

Fleck (12281) O-Ring, Top of Tank; 3-1/8" ID, 3-1/2" OD, 3/16" Width Pentek (151254) Big White & Big Clear Filter Housing O-Rings; Aquapure; Aqua-Pure aligning all bolt holes withThe Fleck 12281 O Ring provides a reliable seal at the top of your water softener tank, preventing leaks where the control valve meets the mineral tank. This AS568 338 standard O ring measures 3 1 8" inner diameter, 3 1 2" outer diameter, and 3 16" width for precise fitment on Fleck valve systems. TECHNICAL DETAILS Fleck 12281 O Ring Specifications Part Number Fleck 12281 AS568 Standard Size AS568 338 Inner Diameter (ID) 3 1 8 inch Outer Diameter (OD)