Hope someone out there has the quick cure for this. It's driving me nuts. I installed an under the sink water filter system with push-in or snap-in fittings for the tubing, at the filter unit and the water supply and the faucet. The water supply and faucet fittings are fine but the two lines going into the filter unit slowly drip.
I've removed the fittings and the plastic part and the o-ring look fine. Reinstalled everything and it still leaks. Re-cut the plastic tubing so it's square, and it still leaks.
Any suggestions????