Rheem 812 Series Owner's Manual And Installation Instructions page 12

ABOUT YOUR WATER HEATER
DOES THE WATER CHEMISTRY AFFECT THE WATER HEATER?
The water heater is suitable for most public water supplies, however some water chemistries may have
"Water Supplies"
detrimental effects on the water heater, its components and fittings. Refer to on page 43.
If you are in a known harsh water area or you are not sure of your water chemistry, have your water checked
against the conditions described on page 43.
HOW LONG WILL THE WATER HEATER LAST?
The water heater is supported by a manufacturer's warranty
(refer to page 90). There are a number of factors
that will affect the length of service the water heater will provide. These include but are not limited to the water
chemistry, the water pressure, the water temperature (inlet and outlet) and the water usage pattern. Refer to
"Precautions"
on page 8.
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