American Water Heater 316888-004 - Manual (Page 11)

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FIGURE 3
WATER PIPING - MIXING VALVE USAGE
This appliance has been design certifi ed as complying with
ANSI Z21.10.3/CSA 4.3 (latest revision) for water heaters
and is considered suitable for:
Water (Potable) Heating: All models are considered
suitable for water (potable) heating.
Please note the following:
The system should be installed only with piping that is
suitable for potable (drinkable) water such as copper,
CPVC, PEX or polybutylene. DO NOT use PVC water
piping.
DO NOT use any pumps, valves, or fi ttings that are not
compatible with potable water.
DO NOT use valves that may cause excessive restriction
to water fl ow. Use full fl ow ball or gate valves only.
DO NOT use any lead based solder in potable water
lines. Use appropriate tin-antimony or other equivalent
material.
DO NOT tamper with the gas control/thermostat, igniter,
fl ammable vapor sensor or temperature and pressure
relief valve. Tampering voids all warranties. Only qualifi ed
service technicians should service these components.
DO NOT use with piping that has been treated with
chromates, boiler seal, or other chemicals.
DO NOT add any chemicals to the system piping which
will contaminate the potable water supply.
HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water
heated to a temperature which will satisfy space heating,
clothes washing, dish washing, and other sanitizing needs
can scald and permanently injure you upon contact. Some
people are more likely to be permanently injured by hot
water than others. These include the elderly, children,
and the physically or developmentally disabled. If anyone
using hot water from this heater fi ts into one of these
TO SUITABLE
DRAIN
DRAIN VALVE
COLD WATER
INLET
METAL
DRAIN PAN
6 in.
(15cm)
MAX.
AIR GAP
DISCHARGE
PIPE (DO NOT
CAP OR PLUG)
TEMPERATURE-
PRESSURE
RELIEF VALVE
TEMPERED
POTABLE WATER
SUGGESTED PIPING
ARRANGEMENT
FOR TOP
CONNECTIONS
SHUT-OFF VALVE
TEMPERED
POTABLE WATER
PIPE INSULATION
(RECOMMENDED)
FLOOR
DRAIN
MIXING
VALVE
(OPTIONAL)
THERMAL
EXPANSION
TANK