The TeeJet 23120-1/2-PP Poly Pressure Regulator, which comes with a 1/2" male inlet and 1/2" female outlet pipe thread connection, is a manual piston-type pressure relief / regulating valve designed to bypass excess liquid.
You can attach this regulator to a tee and then attach the tee to a pump and you will have a durable pressure regulator for your spraying unit. The regulator is adjustable to maintain control of line pressure at any pressure within the regulator's operating range.
The TeeJet 23120 Pressure Regulator has polypropylene construction for excellent corrosion resistance, perfect for use in many spraying applications. Its extra large valve passages allow you to handle large flows.