NorthStar Sprayer Regulator &#160;Precisely controls pressure from 0 to 100 PSI when broadcast or spot spraying 2in. pressure gauge makes it easy to monitor system pressure Three working ports, 3/4in. quick connect and two 1/4in. FNPT for use with spray guns, broadcast booms and pressure gauge 3/4in. quick connect bypass port returns fluid to tank Approved for use with Roundup agricultural herbicide. Designed to work with the following NorthStar sprayers: 2681022, 26810011, 2681201, 2681101, 26812101, 2851701, 2851801, 2681851 and 2287181