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A full port (3/4" valve) must be
located on the cold water side. No valves are allowed on
the hot water side (Section 890-1190g - *ILP).
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A water heater must be tied in with
dielectric unions if dissimilar metals are used (Section
890.350b - *ILP).
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All soldering must be done with a
lead-free solder (Section 890.320d - *ILP).
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All copper pipe shall be type L Rigid
pipe, no flexible connectors (Section 9-3-3-18(D) - *VC).
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Installation and any re-piping shall be
done by a licensed plumber or the owner occupying the
property (Illinois
License Law, Chapter 111 - *ILP).
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All gas pipe shall be solid, no flexible
connectors, with an easily accessible gas valve tied in
with a union and a drip leg (Section 890, Appendix I,
Illustrations L and M - *ILP).
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A relief valve pipe or tube shall be of
full size (3/4") and extend to within six inches
(6") above floor and discharge to a suitable drain
and must be galvanized or copper (Section 890.1230d - *ILP).
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All flue pipe shall have three screws at
each joint. The draft diverter shall also be screwed down.
The contractor shall certify that the existing flue or
B-vent is in good condition (Section *M-1601.3.1).
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If water heater is located in a closet or
other enclosed space, the space must be ventilated,
usually with a vent opening at both the top and bottom of
the space. Each opening must be 100 square inches (Section
*M-1702.2).
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A new heater should be located in the same
general area as the old heater, and if on a platform shall
again be installed on a platform of the same elevation as
the original heater. A gas heater in a garage must be
raised eighteen inches (18") above the floor
(*M-1307.3).
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The water heater shall be installed in
accordance with the Illinois State Plumbing Code.
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If an electric water heater is installed,
it must conform to the appropriate electrical codes.
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The proper clearance must be provided
between a gas heater and combustible material, as
specified by the manufacturer (*M-1306).
