Blue push fit coupler, a straight push-to-connect coupling that joins any combination of Copper, PEX, CPVC, PE-RT or SRD9 HDPE pipe. The pipe is simply pushed into the fitting deep enough to seal on a specially formulated O-ring, and stainless steel teeth then bite down and grip it, so soldering, clamps, unions and glue are unnecessary. The coupler is designed for potable water and radiant heating lines, including underground and behind-the-wall runs where access panels are unnecessary. It is rated up to 200°F and 200 psi. It has blue ribbed end nuts on both sides of a black centre body and is made from high grade raw materials, with stock held in an in-house storehouse that keeps products away from moisture, rainwater and sunlight.