DIG's D54 two-in-one Filter/Pressure Regulator assembly combines a 150 mesh stainless steel filter with a 25 PSI pressure regulator, reducing the number of components needed to start a drip irrigation installation, making it smaller, more dependable and easier to install. The heavy duty filter/pressure regulator's compact design fits in smaller sized areas while supporting reliable operation and easy maintenance of a drip irrigation zone. Install the 150-mesh filter built in with 25 PSI pressure regulator upstream of the control valves or after the solenoid valve and that the unit should not be operating under a static pressure. Make sure to use 3 to 5 rounds of Teflon tape on all male threads before installation.