Designed to help reduce heavy sand and sediment in your home plumbing and appliances, the GE Whole House 20 in. Water Filtration System installs in home's main water inlet. It is a high-flow system with a 20 psi -100 psi feed water tolerance. Integrated pressure relief valve allows excess pressure to be released when changing out the filter. System includes 1 in. plumbing connection and mounting bracket for simple installation.