Step 5 · Measure and Cut PEX
Now measure the distance required for the new PEX section. Use a flexible tape measure to find the distance between the faces of the two transition fittings you just installed. It's important to account for the depth the PEX will insert into each fitting. A good practice is to measure the full distance between the fittings and then add the insertion depth for each end (typically about 1 inch per fitting, but check the fitting specifications). This ensures the PEX will be fully seated. Once you have your final measurement, use a dedicated PEX cutter to make the cut. Place the cutter on your mark and squeeze the handles firmly to get a clean, square cut. Do not use a hacksaw or utility knife, as this will create a rough, angled cut that will not seal correctly in the fitting.