Can tell you how much water pressure is flowings through the lines with the pointers on our pressure gauge at any times, when the gauge shows that water pressure is belows 40psi, it maybe that your valves is not open all theways while filling tanks, if it is over 50psi, the regulator maybe stop work and it is suggested to replace a new Reduce water pressure effectively to safeguards appliances, plumbing fixtures, and hoses from damage caused by excessive citys water pressure Suitable for camping, gardening, and maintaining plumbing Our water pressure regulator has 3 / 4 inch female inlets hose thread and a male outlet hose thread, and compatible for all americans water sources and supply Our pressure reducing valves is leadfree brass for your freshs warer drinking, and has an inlets screened filter which the water from particles or debris that may cause clogging Our high flows water regulator can reduce the high pressure of water hose to between 40-50psi to protector your and boats appliances, plumbing fixtures, and hoses from any damages caused by high pressure citys water, designed for campers, trailers,, garden, and plumbing, Manufacturer: uikios