Cold Expansion Sweat Adapter - Products
A cold-expansion sweat adapter transitions a PEX-A expansion line to a copper sweat or solder connection, letting you tie PEX into existing copper plumbing. Moonshine Bath stocks cold-expansion sweat adapters in common PEX-to-copper sizes.
The clean way to join PEX-A and copper systems. Each adapter ships free across the USA, Canada and Mexico, dispatches within 24 hours on weekday orders before 2 PM EST, and carries our price match plus 10 percent beat guarantee.
Frequently Asked Questions
How do I solder a PEX sweat adapter without melting the PEX?
Solder the copper end to the copper pipe before making the PEX expansion connection, or keep the torch flame well away from the PEX side and let the fitting cool before expanding the PEX onto it.
Why transition PEX to copper?
It is common when tying new PEX-A into an older copper system, or connecting to copper stub-outs at fixtures and appliances. The adapter joins the two materials reliably.