The 3/4-in. female hose thread (FHT) pressure gauge is engineered to measure water pressure up to 200 PSI. It is constructed from high-quality materials, including a metal case, plastic face, precision internal mechanicals, and a durable brass fitting which connects to a standard 3/4-in. hose faucet. You can install it as a permanent gauge or use it as part of a sprinkler toolkit. Proper regulation of water pressure ensures optimum performance of sprinklers and drip emitters and can extend the life of sprinkler equipment. For outdoor irrigation use with cold water only.