Review on 💧 Heavy Duty Square Body 1/4 Turn Angle Shut Off Valve, 1/2 in. NOM Comp Inlet x 3/8 in. OD Compression Outlet, Chrome Plated Brass (5 Pack) by Todd Fernandez

This is typical cheap Chinese junk. The two I've used so far don't seal. No clamps could stop the constant leaks. In addition, there is a warning on the packaging stating that overtightening may cause the product to tear and fail. Talk about CYA. I hope PTFE tape can fix them; If not, then I have a real problem. As they were sold as a pack of five I'm sticking with them, including three more that I dare not use let alone buy a replacement. Update: PTFE tape fixed a valve. Tightening another managed to eliminate leaks. I bought Made in USA to replace three others.