Built to take the pressure, the Toro 1" (2.5 cm) In-Line Jar-Top Valve operates in the widest flow and pressure ranges from 0.25 to 30 GPM (.9 to 113.6 LPM) and 10 to 150 PSI (.7 to 10.3 BAR). These valves are typically installed below ground and are housed in a valve box keeping them securely out of sight. The threaded bonnet jar top system enables fast and easy servicing.