Wednesday, May 16, 2012

How to Connect PEX-AL-PEX

PEX-Aluminum–PEX tubing is only compatible with select fittings. Standard PEX-AL-PEX only works with press or compression fittings designed for PEX-AL-PEX. This limited selection can make it difficult to find fittings.

Let’s say you had to connect two pieces of 1/2” PEX-AL-PEX together. You could use Uponor’s D4545050 coupling, but this requires a proper press tool. Without the tool you would need to use two separate compression fittings and a piece to connect them. Try either two PAP-0500M fittings along with a TB1-08 coupling, or two D4120500 fittings and a A4322020 nipple. The particular fittings required differ for other PEX-AL-PEX sizes. Visit to browse our full selection. (*Please note that Viega's FostaPEX tubing does not work with the fittings mentioned above. It requires Viega PEX Press fittings.)