Review on CEKER 1/2 Push To Connect Fittings Air Fittings PC 1/2 Inch Tubing Od X 3/8" NPT Thread Male Air Line Fittings Pneumatic Fitting Push In Connector Compression Fittings Quick Connect Fittings 2Pack by Christopher Shah

Nice looking fitting. Decent cost. I had two fittings to replace. First one went fair, but I had to remove hose to re-torque the fitting to stop leakage. Second fitting I have replaced twice. First time it leaked at both the thread and the hose ports. When I attempted to remove the hose I could not press the plastic piece enough to pull out the hose. This seems to be a common problem with these fittings. After I removed, I decided to replace the hose as well - as the old one was pretty chewed up at the fitting end and not enough hose to cut and reuse. This time I very carefully added extra teflon tape to the threads on an unused fitting. I tightened it very firmly and inserted the new hose into the fitting. This time, no leakage at the hose however the threads still leaked a bit. I tightened as much as I dared but could not completely stop the leakage at the threads. I am not sure the thread is exactly correct is what I am surmising.Pros: Reasonable cost, decent hose to fitting set up.Cons: Leakage at threads tough or impossible to stop. Difficult or impossible to remove hose once inserted (this is not necessarily a bad thing IMHO). Soft material. Began to round off fitting when really torquing it down to try to the leakage. I believe the thread is not cut perfectly to NPT specs.