John Guest Check Valve - 1/2" 0.3 psi Crack Pressure

Super easy, works great.

I got these in the mail and had them all hooked up in a few minutes. The one drawback is that there isn't a red gasket on one side indicating the direction of flow, only a very faint arrow that my old eyes had to check multiple times to make sure I was getting it right.

Perfect

My Well is now protected with this backflow check valve from critters, bugs, bacteria. Works like expected, very nice

Works awesome