Hayward XStream Cartridge Filter Internal Kit | WFXJ500KIT Spa Heaters The Napoleon 4D90L-BULK Swivel Elbow

The Napoleon 4D90L-BULK Swivel Elbow is a 90-degree swivel elbow designed for Napoleon venting systems

permanent control backup

A working check valve helps protect heaters

Use it for routine maintenance to preserve debris removal efficiency and extend the life of your cleaning equipment

It's heat-only (no cooling mode)

Hayward XStream Cartridge Filter Internal Kit | WFXJ500KIT Spa Heaters The Napoleon 4D90L-BULK Swivel ElbowWhat This Part Is Used For The Hayward WFXJ500KIT is an internal kit used to service compatible Hayward XStream cartridge filters. It supports rebuilding the internal wear components that affect how the filter seals and functions during normal operation. This kit is used during filter maintenance when internal parts are worn or damaged. Why This Part Matters When internal components wear out, filters can leak, lose proper sealing, or become difficult