All Parts are Contained in a One-Piece Cartridge Taco’s self-compensating Cartridge Style Pressure Reducing Valve, sets a new standard for performance and serviceability. All the parts are contained in a one piece cartridge which can be easily removed and serviced without reducing the system pressure. A fast-fill mode that automatically returns to the normal mode when the set pressure is reached and delivers increased flow to speed system fill times. The Cartridge Style Pressure Reducing Valve unique dial-in pressure setting allows for easy adjustment throughout the 10-50 psi range, without the need for an external gauge. Quality features include a stainless steel spindle, integral stainless steel coaxial strainer and easy, dial-up pressure setting that eliminates pressure gauges.