Raindrip®'s single station battery-operated analog water timer is for 3/4" faucet/hose spigot hook-up. Large control knobs for easy set-up. Features adjustable frequency & run times. The pressure regulator has a 3/4" inlet & outlet. It maintains 15-20 PSI for circuits totalling up to 360 GPH. The adaptor connects 1/2" poly hose to a faucet or other 1/4" male hose thread.