WATER SUPPLIES
13
CHANGE OF WATER SUPPLY
The changing or alternating from one water supply to another can have a detrimental effect on the operation
and / or life expectation of a heat exchanger, a copper cylinder, a temperature pressure relief valve and a
heating unit.
Where there is a changeover from one water supply to another, e.g., a rainwater tank supply, bore water
supply, desalinated water supply, public reticulated water supply or water brought in from another supply,
then water chemistry information should be sought from the supplier or it should be tested to ensure the
water supply meets the requirements given in these guidelines for the Rheem warranty to apply.
SUMMARY OF WATER CHEMISTRY ADVICE AFFECTING WARRANTY
The water heater and its components are not suitable for certain water chemistries. Those chemistries are
listed below. If the water heater is connected at any time to a water supply with the following water chemistry,
the Rheem warranty will not cover any resultant faults on the components listed below:
Water Chemistry
Component
Saturation Index (SI) < -1.0
copper cylinder
copper heat exchanger
copper sheathed heating unit
Saturation Index (SI) > +0.4
(if expansion control valve is not fitted)
copper cylinder
temperature pressure relief valve
Saturation Index (SI) > +0.8
copper cylinder
copper heat exchanger
heating unit
