Product Description: Used to connect Zurn 1/2' Pex Tubing to Zurns QickZone Manifold or Zurns Preassembled Manifold (#QHPM). To connect the tubing to the manifold you first make sure that the tubing is cut to length with a straight cut free of burrs. Slide the nut over the tubing with the threads facing the manifold, then slide the split ring over the tubing. Insert the barbed fitting into the tubing. Insert the O-Ring end of the barbed fitting into the Manifolds port, slide the nut and split ring up the tubing and thread the nut onto the Manifolds port. Use a wrench to tighten the nut until snug.