Multiple Z1022 trap primers can be used on the same supply line so long as the minimum line pressure and flow requirements of each unit are met. Each unit requires a minimum flow of .5GPM from the water source and a static line pressure between 20 and 80 psi. In order to operate the trap primer at static pressures between 20 and 80 psi, a pressure drop of 2 to 3 psi is required. Zurn also offers 2, 3, and 4-outlet distribution units (-DU) which can be used as a way to prime multiple traps using a single Z1022.