Running my system without the cartridge filter, the gauge reads 26psi. I bought a new gauge and it reads 22psi. With the filter in, its about 30 psi. Do I have a problem with high pressure? The gauge at the Caretaker in-floor system which is after the filter reads 10psi without the filter in. It reads 0 with the filter in. I think I need a new filter at least.