4" SS Housing PVC End Plug 1/2" & 3/4" FNPT

This PVC end plug fits the bottom of Crystal Quest 4-inch stainless steel Big Blue filter housing assemblies, providing a sealed base with 1/2-inch or 3/4-inch FNPT (female national pipe thread) connection ports. Used when replacing a damaged end plug, reconfiguring a multi-stage filtration system, or building new whole house or commercial assemblies.

The FNPT threaded connections accept standard pipe fittings for flexible plumbing configurations in whole house, commercial, or industrial filtration systems. Compatible with Crystal Quest 4-inch stainless steel housing bodies used across the CQ commercial and whole house filter lineup. Verify thread size and housing diameter before ordering.