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Regular maintenance will keep the water heater operating at peak efficiency.
The tank can fail prematurely from an accumulation of lime and sediment on the bottom and
tubes, excessive pressure and/or corrosion.
Prevention will appreciably extend the life of the water heater. Lime and sediment accumulations can
be controlled by softening the water. Inspect the tank every six months by draining, removing the
hand hole cover and making a visual check of the interior. Remove lime or sediment with a commer-
cial lime dissolving chemical or scrape loose the deposit and flush it away through the hand hole or
drain.
Excessive pressure is controlled by the pressure relief valve. Water expands when heated; if it can-
not expand into the cold water line because of a check valve, the pressure relief valve opens and
dumps the extra water. If the relief valve is faulty or none has been installed, the tank can fail due to
this excessive pressure. Open the relief valve at least once a year to make sure the seat is not
stuck. Caution: Before opening the relief valve, be certain the discharge line directs the water away
from the outlet to avoid contact with the water.
Magnesium anode rods are installed in the head of the tank to help prevent corrosion. When
inspecting the tank interior for lime, also inspect the anode rods. When the original diameter of any
of the anode rods has eroded to about one-third it should be replaced.
Freezing: If the water heater is to be shut off during cold weather, the tank and water lines must be
drained to prevent freezing, which will crack the tank. Open the relief valve test lever annually.
The warranty will be invalid if the tank fails due to excessive pressure, accumulation of lime or sedi-
ment, corrosion or freezing.
Clean the oil burner nozzle annually and reset the electrodes. Replace the filter cartridge on the oil
supply line filter annually.
LIMITED WARRANTY
This warranty covers “Bock” Water Heaters models 150, 200 or 250, gas, oil or dual fuel. Bock
Water Heaters, a division of Bock Corporation – a Wisconsin corporation – at 110 S. Dickinson St.,
Madison, WI 53703, (“Company”), warrants to the owner that the tank of this water heater will not
leak due to defective materials or workmanship for THREE (3) years from the date of the original
installation. The company also warrants that no other part of this water heater will fail due to a defect
in material or workmanship for one (1) year. This warranty does not apply where the purchase is for
resale.
Bock Water Heater’s responsibility is to repair or replace, at our option with the prevailing comparable
model, any part of the equipment sold by the Company which proves to be defective in material or
workmanship, including the tank, during the warranty period when installed in accordance with appli-
cable codes and ordinances and operated and maintained in accordance with our instructions, sub-
ject to the conditions and exceptions indicated below. Our liability, in the event of leakage or other
malfunction, is strictly limited to repair or replacement of the defective heater or part as provided
herein. We are not responsible hereunder for incidental property damage or personal injury, conse-
quential costs or damage.
At the company’s request, the owner is to return to the factory al Madison, WI any part, including the
tank, defective in material or workmanship and pay all transportation charges for such return parts
and for replacement parts sent from the factory to the owner. The owner will pay all labor charges for
the removal and installation of such parts, including the tank.
This warranty will not apply to tanks or parts subject to misuse, abuse, neglect, alteration, accident,
excessive temperature, excessive pressure, lime, silt or sediment accumulation, corrosive atmos-
phere, the removal of magnesium anode rods, installation outside of the United States, or on which
the serial numbers have been altered. The warranty also does not apply when the water heater is
installed without a new temperature and pressure relief valve and is not installed in accordance with
local codes and ordinances.
We will not assume nor authorize any person to assume for us any other liability in connection with
the sale or operation of Bock Water Heaters. Any implied warranties, including merchantability or fit-
ness for a particular application imposed on the sale of this heather under laws of the state of sale
are limited to one (1) year. Some states do not allow limitations on how long an implied warranty
lasts or for the exclusion of incidental or consequential damages, so the above limitations or exclu-
sions may not apply to the purchaser. This warranty gives specific legal rights – other rights may
vary from state to state.
The card should be returned within thirty (30) days of the date of installation; otherwise, the
date of manufacture will be recorded as the date of installation for the purpose of this warranty.
Contact your nearest Bock distributor or
Bock Water Heaters • 110 S. Dickinson St. • Madison, WI 53703
Phone: 608/257-2225 • FAX: 608/257-5304 • www.bockwaterheaters.com
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