The Diaphragm in the Marey PP110 and PP220 models plays a crucial role in detecting water flow and activating the heating system. It responds to changes in water pressure, triggering the unit to begin heating when flow is sufficient. A properly functioning diaphragm is essential for accurate activation, consistent hot water delivery, and long-term unit reliability.
All sales are final, please make sure this part is compatible with your water heater model.
