1" PEXLock Clamp, 3-Pack. Rated at 180 degrees at 100 psi and 73 degrees at 200 psi, these clamps are NSF and CSA approved for new building behind wall and underground applications. Quick and easy to install using only a pair of slip joint pliers, these clamps can be reused and are compatible with 1-inch PEX pipe, vinyl hose, PEX A, and PERT Pipe. Remove with a straight head screwdriver, and rest assured with a 25-year warranty.