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Draining and Flushing
Some service work to be performed on the tank requires the
tank to be drained. It is also recommended that the tank be
drained and flushed every 6 months to remove any sedi-
ment and lime which may build up in the bottom of the tank
during operation. Such buildup can result in noisy operation.
To drain the tank:
1. Turn "OFF" the electrical supply to the tank.
2. Close the cold water supply valve.
3. Open a nearby hot water faucet served by the system.
4. Connect a hose to the drain valve and route it to an ade-
quate drain.
CAUTION!
The water being drained can be extremely
hot!
The drain hose should be rated for at least 93°C
(200°F). If the drain hose does not have this rating, open the
cold water supply valve and a nearby hot water faucet
served by the system until the water flow is no longer hot.
Close the cold water supply valve and resume.
5. Open the drain valve and allow all the water to drain
from the tank.
6. Open the cold water supply valve and flush the tank as
needed to remove sediment and any other foreign mat-
ter that may have entered the system. Close the cold
water supply valve when clean water flows.
7. Perform any other servicing as required.
8. Close the drain valve, disconnect hose and refill the
tank (see “FILLING” section).
9. Turn "ON" the electrical supply to the tank.
Cathodic Protection
Your storage booster tank has been equipped with one or
more anodes that protect the tank from corrosion. Over
time, as the anode works, it slowly dissolves and must be
replaced. If the anode(s) is less than 10mm (3/8 in.) in diam-
eter, or has any of the inner steel core exposed, it must be
replaced. Depending on water conditions, an anode can last
from one to ten years. Many localities treat their water and
this can have a significant effect on the life of your heater.
Water conditioning, such as over-softening, can accelerate
the rate at which the anode(s) is consumed. Rapid depletion
can leave a heater unprotected causing a premature failure.
It is good practice to check the anode(s) annually to see if it
needs replacing. Operating a storage tank without an
actively working anode(s) will void the warranty. Failure to
maintain the anode may result in premature failure of the
storage tank due to corrosion and leaks.
Anode Maintenance
1. Turn "OFF" the electrical supply to the tank.
2. Close the cold water supply valve.
3. Open a nearby hot water faucet served by the system
to depressurize the system.
4. Connect a hose to the drain valve and drain 22 litres (6
gal.) as directed in the “Draining and Flushing” section.
NOTE:
The anode(s) has been factory installed using a
power tool. It may be necessary for a second person to sta-
bilize the tank. A few sharp blows on the handle of the sock-
et wrench should loosen the anode nut. If an impact wrench
(power drive) is available, this is an easy way to remove an
anode.
6. Using a 1 1/16" socket, remove anode(s) and inspect it.
The surface may be rough, full of pits and crevices, but
this is normal. If it is less than approximately 10mm (3/8
in.) in diameter, or the inner steel core is exposed, the
anode(s) should be replaced.
7. Apply Teflon® tape or sealing compounds approved for
use with potable water, to the threads of the anode(s)
and install into the tank top.
8. Open the cold water supply valve and open a nearby
hot water faucet to purge air from the tank as directed
in the “Filling” section.
9. Check for leaks, repair as required, and re-test.
10. Turn "ON" the electrical supply to the tank.
