This standard describes 3- to 48-in. (76- to 1,219-mm) gray-iron or ductile-iron
fittings to be used with ductile-iron pipe for water, wastewater, and reclaimed water.
Requirements for fittings with mechanical joints and flanged joints are listed in
Tables 3 through 21 at the end of this standard. This standard may also be used for
fittings with push-on joints or such other joints as may be agreed on at the time of
purchase.
For the 3- to 24-in. (76- to 610-mm) size range, ductile-iron mechanical-joint
fittings and ductile-iron push-on-joint fittings are rated for 350-psi (2,413-kPa)
working pressure. Ductile-iron flange-joint fittings are rated for 250-psi (1,724-kPa)
working pressure; however, 24-in. (610-mm) and smaller sizes may be rated for
350 psi (2,413 kPa) with the use of special gaskets. Gray-iron fittings having all types
of joints described in this standard are rated for 150- or 250-psi (1,034- or 1,724-kPa)
working pressures, as shown in the tables.
For the 30- to 48-in. (762- to 1,219-mm) size range, fittings with all types of
joints described in this standard are shown in the tables with rated working pressures
of 150 or 250 psi (1,034 or 1,724 kPa), depending on the type of iron as shown in
the tables.
Fittings are adequate for the rated working pressure plus a surge allowance of
1 O0 psi or a surge allowance of half the rated working pressure, whichever is less.
ANSI/AWWA C110/A21.10-2008 Referenced Document
ANSI/AWWA C104/A21.4 Cement–Mortar Lining for Ductile-Iron Pipe and Fittings*， 2023-02-01 Update
ANSI/AWWA C111/A21.11 Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings*， 2017-04-01 Update
ANSI/AWWA C116/A21.16 Protective Fusion- Bonded Coatings for the Interior and Exterior Surfaces of Ductile-Iron and Gray-Iron Fittings*， 2023-02-01 Update