This Teejet Pressure Regulator (23120A-1/2-PP), with a 1/2" male inlet and 1/2" female outlet pipe thread connection, can be used in a number of lawn spraying applications. You can attach the regulator to a tee, and then attach the tee to a pump.
The pressure regulator can bypass excess liquid and is adjustable to maintain control of line pressure at any pressure within the valve's operating range. It has large valve passages to handle large flows.
The Viton o-ring enables the regulator to withstand a number of lawn spraying applications, while its 316 stainless steel spring and provides excellent chemical resistance.