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Figure 28. Powered Anode locations
DRAIN VALVE AND TANK ACCESS PANEL
The water heaters are equipped with a ¾ inch (1.9 cm) inch drain valve.
An access panel covers the cleanout opening in the tank, which is sealed by a gasket and cover. RELIEF VALVE
At least twice a year, the temperature and pressure relief valve should be checked to ensure that it is in operating condition. To check
the relief valve, lift the lever at the end of the valve several times. The valve should seat properly and operate freely.
If water does not flow, remove and inspect for obstructions or corrosion. Replace with a new valve of the recommended size as
necessary. A thorough inspection of the valve should be performed at least every three years by removing the temperature and relief
valve from the tank. Do not attempt to repair the valve, as this could result in improper operation and a tank explosion. In areas with
poor water conditions, it may be necessary to inspect the T&P valve more often than the recommended maintenance schedule
CAUTION
Before manually operating the valve, make sure that a drain line has been attached to the valve to direct the discharge
to an open drain. Failure to take this precaution could mean contact with extremely hot water passing out the valve
during this checking operation.
If the temperature and pressure relief valve on the water heater discharges periodically or continuously, it may be due to thermal
expansion of water in a closed water supply system, or, it may be due to a faulty relief valve.
Thermal expansion is the normal response of water when it is heated. In a closed system, thermal expansion will cause the system
pressure to build until the relief valve actuation pressure is equaled. Then, the relief valve will open, allowing some water to escape,
slightly lowering the pressure.
Contact your water supplier or local plumbing inspector on how to control this situation.
WARNING
Above all, do not plug the temperature and pressure relief valve. This is not a solution and can create a hazardous
situation.
VENT AND AIR INTAKE SYSTEM
Examine the vent and air intake system every 3 months. Points of inspection are as follows:
1. Check for obstructions and/or deterioration of vent piping and vent terminal. Replace immediately where needed.
2. Vent pipe and vent terminal screen should be cleaned of any foreign material. The screen is located inside the vent terminal outlet
and is accessible from the outside of the vent terminal elbow. Do not reach inside the vent terminal when the water heater is in
operation.
3. Check all venting system connections for leakage and reseal as required.