Push-to-pull compression fittings
TYPE OF COMPRESSION FITTING THAT ALLOWS AIR LINE TO BE ATTACHED WITHOUT THE USE OF TOOLS
Push to pull; Push to pull compression fittings
Push-to-pull, push-to-connect, push-in, push-fit, or instant fittings are a type of easily removed compression fitting or quick connect fitting that allows an air (or water) line to be attached, nominally without the use of tools (a tool is still usually required for cutting tubing to length and removal). These fittings act similar to the way regular compression fittings work, but use a resilient O-ring (normally EPDM) for sealing, and a grip ring (normally stainless steel) to hold the tube in place.