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SECTION 7
STARCRAFT TOWABLE PLUMBING SYSTEMS
Anode rod protection
The tank in the water heater is protected by a
magnesium or aluminum anode to prolong the
life of the tank by absorbing the corrosive
action of hot water.
Under normal use, the anode rod will
deteriorate and because of this, the water
heater manufacturer recommends the anode
rod be replaced yearly. Water with high levels
of iron and/or sulfate will increase the rate of
deterioration; therefore, more frequent
replacements may be required.
If an anode rod is mostly eaten away, replace
it with a new one.
The water heater manufacturer recommends
replacement of the anode rod when
consumption or weight loss is greater then 75
percent
.
Fig. 7.5 Anode rod replacement chart
Operating the water heater without the proper
anode
rod protection will decrease
tank life and will void the tank manufacturer’s
warranty on the tank. To extend the anode
life, drain the water from the water heater tank
whenever the RV is not being used. Avoid
any extended time of non-use with water in
the tank.
When cold water is heated in the water heater
tank, the water pressure will rise. For this
reason, a pressure and temperature (P&T)
relief valve is required for safety in all water
heaters. It is normal for the P&T relief valve to
release a small quantity of water during the
heating cycle and does not indicate a
defective P&T relief valve. One way to reduce
the frequency of the water weeping or
dripping from the P&T relief valve is to
maintain an air pocket at the top of the water
heater. This air pocket will form in the tank by
design; however, it will be reduced over time
by the everyday use of your water heater
(refer to the manufacturer’s manual); If the
weeping persists, consult your dealer or a
service agency authorized by the water heater
manufacturer.
To prevent a water leak when replacing the
anode rod, a pipe thread sealant approved for
potable water (such as Teflon Tape) must be
applied to the threads of the anode rod.
Proper application of a thread sealant will not
interfere with the anode’s
Do not replace anode rod or any other
component with an accessory part that is
not authorized by the water heater
manufacturer, such as an “add-on electric
heating element. Such items are not
approved to be installed and could create
an unsafe condition and will void all
warranties
High altitude deration
Operation of the water heater at high altitudes
may require derating. If the water heater is not
properly derated, lack of sufficient oxygen for
combustion may produce improper burner
operation. Pilot outage caused by burner lift-
off or sooting from a yellow burner may occur,
indicating the possibility of carbon monoxide.
You may also notice a lack of efficiency in
heating the water because of incomplete
combustion of the burner at these higher
altitudes.
Consult with the local propane company, your
dealer or the water heater manufacturer for
proper derating of the water heater. Change
out of the orifice (derating) should be done by
the dealer or a qualified service agency.

NOTE : It is important that once the RV
has returned to lower elevation (below 4500
feet) any high altitude deration or other
adjustments be reversed for proper operation
of the water heater
.
Pressure & temperature relief valve
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