Waterway 1-1/2″ SPG Union, 400-4240

The Waterway 400-4240 is a pump union, listed as 1-1/2 inch fbt by 1-1/2 inch spg. It is the genuine Waterway part.

What a union buys you

A union is a joint you can take apart. Without one, a pump is glued into the plumbing and any service means cutting the pipe and building the joint back with couplings. With one, you back off the nut, lift the pump out and put it back the same afternoon. On a pump that will be pulled for winterising, reseals or replacement, that is the difference between a job and a project.

Sizing

This is the 1-1/2 inch union. The spigot end goes into a socket, and Waterway lists the opposite side as 1-1/2 inch fbt. Waterway makes unions in other sizes and in mixed size combinations, so read the size off your own plumbing before ordering rather than going by eye. A union that is one size out will not seal, no matter how hard the nut is drawn up.