Save big on the Honeywell DS06-100-SUT-LF 1/2 IN. "DialSet" Female Single Union, Internally Threaded-PRV while supplies last online here at PlumbersStock. If your water pressure is too high, you may need a pressure regulating valve. Honeywell makes products that we're proud to carry. Make sure you have the right part number, and if you aren't certain, try contacting us.