Cash AcmeFWL-2 14721-0150 1/2-inch Pressure Relief Valve, ball valve, brass, water valve shut off, push connect fittings, plumbing fittings

Solid no plastic seems to work well. Bought a different brand first and it had a big plastic piece in it. This one is all lead free brass.

Easy to install on the cold water line and protects the tank from imploding. Yes, that occurrence is rare but this is cheap insurance. You need an angle fitting with a female IP end to install it. I tested it by hooking on a drain hose and opening the valve under pressure. The hot water immediately shut off at the faucets. Many installers say you don't need this , but the parent uniform plumbing code and WH manual says you should have it. Five stars comes with length of service experienced.

Part came quick and works well.

Received Vacuum relief valve instead of pressure releif valve.

Nice heavy duty vent. Should last