Intertek TWO GALLON ELECTRIC WATER HEATER Installation & Operating Instruction Manual page 13

Maintenance continued-
4. If the combination temperature and pressure relief valve on the
appliance discharges periodically, this may be due to thermal expansion
in a closed water supply system. Contact the water supplier or local
plumbing inspector on how to correct this situation. Do not plug the
combination temperature and pressure relief valve outlet for any reason.
5. A combination sacrificial anode rod/hot water outlet nipple has been
installed to extend tank life. The anode rod should be inspected
periodically (every 2 years) and replaced when necessary to prolong tank
life. Water conditions in your area will influence the time interval for
inspection and replacement of the anode rod. Contact the plumbing
professional who installed the water heater or the manufacturer listed on
the rating plate for anode replacement information. The use of a water
softener may increase the speed of anode consumption. More frequent
inspection of the anode is needed when using softened (or phosphate
treated) water.
FOR YOUR SAFETY, DO NOT ATTEMPT TO REPAIR THERMOSTAT(S),
HEATING ELEMENTS, OR ELECTRICAL WIRING. REFER SUCH
REPAIRS TO A QUALIFIED SERVICE TECHNICIAN.
Contact your local plumbing supplier or plumbing professional for
replacement parts or contact the company at the address displayed on the
rating plate of the water heater.
For faster and better service, please provide the part name, model, and
serial number(s) of the water heater(s) when ordering parts.
CAUTION
13