water pressure regulator natural gas pressure regulator high pressure regulator WATER PRESSURE REGULATOR The Cashco Model 6987 is a heavy duty, high pressure , self- contained back pressure /relief water pressure regulator for controlling fluid pressure between 50 and 800 psig (3.4 and 55.2 Barg) setpoint levels. Pressure builds up to 20% above setpoint pressure are possible. The body design is an angle configuration with a side inlet and bottom outlet. Available options include flanged end connections and stellited seating surface. APPLICATIONS for Model Designed for controlling a wide range of fluids including air, inert gases, water pressure, fuel oil and chemicals. Model 6987 is not normally utilized in steam service.