Well Crap... everything I got was push to connect, couldn't get the right size fittings in compression anywhere online. Locally the male thread ends were far too large to go where I need them. I was concerned about the push fittings leaking under pressure... Thanks for the heads up.For info I replaced all of the push-to-connect fittings with compression style fittings (1/8" NPT x 1/4" hose). I had issues with the PTC leaking and hoses blowing out of the fittings. No leaks with the compression fittings.