Rinnai Check Valve PPTL to PVC Direct Vent

Features: Prevents the backflow of exhaust gases into idle tankless water heaters. Must be installed on each tankless water heater that is a part of the PVC and CPVC common vent system. Intended for exhaust flow only. Intake air must be plumbed separately to the intake side of the tankless water heater. Accepts 3” PVC/CPVC 4” PVC/CPVC system sizes achieved through the use of reducers attached to 3” PVC/CPVC