Pentek White Cap for #5, #10, #20 Slimline Housings w/ PR - 1/4" FPT

Replacement cap WITH pressure relief fits all Pentek Slim Line (SL) Sumps #5, #10 & # 20 filter housings (blue, clear).  NOTE: The bottom Cap threads are 3.86 OD x 3.153" ID and do NOT fit the 3G Slim Line (SL) filter housings.