Step 6 · Connect PEX Section
With the PEX pipe cut to length, the final connection is simple. As you did with the galvanized pipe, you can optionally use the depth gauge to mark the insertion depth on both ends of the PEX tube. Take the cut PEX section and insert one end into one of the open transition fittings. Push it straight in with firm pressure until it seats fully against the internal pipe stop and you feel the 'click'. The end of the PEX should meet the depth mark you made. Now, flex the PEX pipe slightly and align the other end with the second fitting. Push it in firmly until it also clicks and is fully seated. Give a gentle pull on both ends of the PEX pipe to confirm that the grab rings have engaged and the connections are secure.