Wirsbo ProPEX Manifolds can only be connected using a Wirsbo Expander Tool. The connections on the end of the manifold are too large for PEX pipe to fit over without first being expanded. To do so, insert the head of the Wirsbo Expander Tool into your PEX Tubing (with ProPEX ring slid over the edge of the tubing) and squeeze the handles together 5-10 times. This will make the tubing expand, allowing the tubing to slide over the manifold. The tubing will then shrink back to it's original size, creating a secure fitting over the manifold.
PEX Tubing, PEX Tools, and PEX Manifolds can be found at www.supplyhouse.com
