Pressure Relief Valve - Tiffin Motorhomes WAYFARER 2017 Owner's Manual

APPLIANCES & ACCESSORIES

PRESSURE RELIEF VALVE

The relief valve for over-pressure and over-temperature conditions is located on the exterior of the
water heater. This valve will operate if the water temperature reaches or exceeds 210°F or if the
water pressure reaches or exceeds 150 psig.
Since the water system in the motorhome is a closed system when all water valves are shut, the
water-heating cycle can raise the temperature and, consequently, the pressure, of the water in the
water heater; thereby realizing pressure increases approaching 150 psig.
Should this pressure (i.e., 150 psig) be reached, the pressure-relief valve will begin "weeping," that
is, minor dripping or leakage from that valve until the pressure drops below 150 psig, at which time
the pressure-relief valve will re-seat itself and restrict the water flow. This is normal operation and
should not be a cause for alarm. Do not obstruct or block the pressure-relief valve in any way, as this
would keep the valve from functioning normally and protecting the hot water system.
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