Waterway Pump Union Assembly, 1.5″ x 1.25″ Hose Adapter, 400-9280

The Waterway 400-9280 is a pump union assembly supplied with a hose adapter and an o-ring. It is the fitting that lets a pump be taken off without cutting into the plumbing.

Why unions earn their place

A pump gets pulled more often than anything else at the equipment pad: seals, impellers, motors, replacements. If it is glued in, every one of those jobs starts with a saw and ends with new couplings and a wait for the cement to set. A union unscrews by hand and the pump lifts straight out.

Sizing, read this first

The source information for this part is not consistent. The product title describes it as a 1.5 inch by 1.25 inch hose adapter, the longer description calls it a 2-1/2 inch union nut with a 1-1/2 inch or 1-1/4 inch hose adapter and an o-ring, and the size attribute reads 1-1/4 inch. Measure the union you are replacing, or tell us the pump model, before you order.

The o-ring

It is included. It is also the part that usually fails first, so if a union is weeping rather than cracked, start there before replacing the whole assembly.