About this union/fitting
The Waterway 400-4300 pump union is a 45-degree angled plumbing fitting designed for 2-inch spa pump connections. This OEM union connects 2″ FBT (female buttress thread) to 2″ spigot fittings, providing a reliable seal at pump discharge points in most residential spa systems. The angled design helps navigate tight plumbing runs while maintaining optimal water flow.
Built to Waterway’s exacting standards, this genuine replacement union ensures exact fit compatibility with original equipment. Bubbles Supply guarantees same-day shipping on in-stock orders and backs every union with our comprehensive 1-year warranty for complete peace of mind. When installing, hand-tighten the threaded connection first, then use a strap wrench for the final quarter-turn to achieve proper seal without over-tightening the plastic threads.
