I purchased a brand new hose end pressure gauge and the water coming out of the hose faucet reads 64 PSI.
I then put a 25 psi pressure regulator between the faucet and the gauge, and it still read 64 PSI. This setup means that no water was flowing.
In total I tested two old 25 psi regulators and one new one and they all read 64 PSI.
I don't think it's a bad pressure gauge because if I turn the water on very slowly the pressure builds slowly but if I turn it on all at once the needle shoots to 64 at once.
Do pressure regulators only reduce pressure for running water for some reason or did I somehow managed to get three duds?