Fittings are normally lined with bituminous or cement lined and sealed
with bituminous in accordance with ANSI/AWWA C104/A 21.4. Flanged
exteriors are normally coated with a rust inhibitive primer or with
bituminous coating. Mechanical joint fittings are normally coated with
bituminous. However, many additional types of coatings and linings are
available. See NAPF Section 500 for further details.

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