The Rainbird PSI-L Series Pressure Regulators with three-quarter inch female threaded inlet and three-quarter inch female threaded outlet. Use for flow rates of 6-300 gallons per hour (or .10 - 5.0 gallons per minute) where a downstream pressure setting of 6, 10, 15, 20 or 30 lbs psi is required.
For drip mist flows exceeding 300 gallons per hour or regular irrigation applications exceeding 5 gallons per minute - go to the M Series medium flow rate pressure regulators.