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10
QUARTERLY INSPECTION
3. Monitor thermostat
a. Let water heater completely heat to a designated thermostat setting.
b. After thermostat satisfies (that is, when the thermostat actually clicks off), draw water from the relief
valve.
c. Compare water temperature of drawn water to the temperature setting of the thermostat when it
satisfies. Normal variation between the two points is approximately +
7°F.
d. If these two readings do not coincide within acceptable tolerances and verification has been made of
the accuracy of the temperature-reading gauge, replace the thermostat.
4. Lift test lever on relief valve and let water run through valve for a period of approximately 10 seconds.
This will help flush away any sediment that might build up in water passageways.
5. Inspect element flange for leakage as follows:
a. Shut off Power Supply.
b. Remove element housing cover.
c. Visually inspect heating element gasket for evidence of leaks.
d. Rub finger around gasket that is between the heating element and tank flange for any evidence of
moisture. If moisture is present or a water drip is observed, follow procedure outlined in Section V.
6. Check for loose electrical connections. Tighten as necessary.
ANNUAL INSPECTION
1. Flush tank as follows
a. Shut off power supply.
b. Close valve on hot water outlet piping.
c. Open valve on drain piping.
d. Cold water inlet line pressure will be strong enough to flush sediment from the bottom of the tank out
through the drain. Let water run for 3-4 minutes.
e. Close drain valve.
f. Open hot water valve.
g. Turn power supply ON.