Raindrip R462C Preset Pipe Pressure Regulator Maintains 15-20 psi for circuits totaling up to 360 GPH 3/4-inch pipe thread inlet by 3/4-inch pipe thread outlet Designed for use with drip irrigation watering systems Durable plastic construction Built to last Preset pipe pressure regulator Made of high impact ABS Flexible pressure regulators Maintains 25 to 30 PSI for circuits totaling up to 360 GPH