Pentair Compool PacFab 2 & 3-Way Valve 1/4-20 x 3/4" Screw (520389) terminals A rectangular DE grid helps

A rectangular DE grid helps provide the filtration surface needed inside a compatible diatomaceous earth filter

this Hayward true union ball valve is a practical replacement when the original 1 inch shutoff valve needs renewal

and a more complete rebuild outcome

Hydro-Quip PS electronic heater

and V3 support using the 0612-221041-431 reference

Pentair Compool PacFab 2 & 3-Way Valve 1/4-20 x 3/4" Screw (520389) terminals A rectangular DE grid helpsThis 1 4 20 x 3 4 inch screw is used with compatible Compool PacFab 2 way and 3 way valve assemblies where secure fastening is required. It is a small but important replacement part for valve service, especially when original screws are stripped, corroded, missing, or no longer tightening correctly. Using the correct hardware helps maintain even pressure on the valve cover or related component and reduces the chance of leaks caused by improper