Sediment Traps - A.O. Smith BL-80 Instruction Manual

SEDIMENT TRAPS

A sediment trap shall be installed as close to the inlet of the water
heater as practical at the time of water heater installation. The
sediment trap shall be either a tee fitting with a capped nipple
in the bottom outlet or other device recognized as an effective
sediment trap. If a tee fitting is used, it shall be installed in
conformance with one of the methods of installation shown in
the Figures 15 and 16.
Contaminants in the gas lines may cause improper operation of
the gas control valve that may result in fire or explosion. Before
attaching the gas line be sure that all gas pipe is clean on the
inside. To trap any dirt or foreign material in the gas supply line,
a sediment trap must be incorporated in the piping. The sediment
trap must be readily accessible. Install in accordance with the
"Gas Piping" section. Refer to the current edition of the National
Fuel Gas Code, ANSI Z223.1/NFPA 54 or the Natural Gas and
Propane Installation Code CAN/CSA B149.1.
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