At what pressure should this thing be opening, i hooked the water up today turned the hose on low and checked for leaks, water was coming out of the dump like it should, i then pressed my finger onto the dump to build some pressure while watching my pressure gauge. At about 10PSI i heard the basset valve click and it started to let water through to the headers. I don't exactly know how much pressure is going to be running through the block at idle from the pump because i never had a pressure guage before, but i know my regulator will only go down to 25 PSI. Is my spring weak, this basset valve is brand new but about 10 years old...