Thanks for the reply JW. To be more specific the parts that I need are the end pieces or ferrules. The ferrules include a small O-ring also. These ferrules are pushed into the housing, then the tubing is inserted. They allow the PEX tubing to be removed when you push down on the ferrule. I have checked Home Depot and Lowes. They have a large selection of push in connectors but not what I'm looking for. I don't have an Ace Hardware close, but looking at their stock it looks the same as Home Depot, etc.