Waterco 2-1/2" BT x 2" S Union Adapter (63406550BLK) inletoutlet An adapter like this is

An adapter like this is useful because it helps different plumbing formats work together cleanly while preserving the intended serviceable union-style connection

1 inch MPT connection

When the mounted heating element stops performing properly

Includes unions

Waterco 2-1/2" BT x 2" S Union Adapter (63406550BLK) inletoutlet An adapter like this isThe Waterco union adapter is designed for compatible plumbing systems that need to transition from a 2 1 2 inch buttress thread connection to a 2 inch slip connection. An adapter like this is useful because it helps different plumbing formats work together cleanly while preserving the intended serviceable union style connection. This replacement is especially useful where one side of the assembly requires a threaded union interface and the other side