The Lansdale 111.10SP 4" water pressure gauge is a reliable tool for measuring water pressure in the range of 0 to 300 psi. With a 1/4" NPT LM connection, this gauge is designed for industrial use in hydraulics, pneumatics, pumps, and plumbing applications. The 4" dial size makes it easy to read the pressure accurately, making it a valuable addition to any business or industrial setting that requires precise monitoring of water pressure levels.