This standard describes 3-in. through 64-in. (76-mm through 1,600-mm)
ductile-iron compact fittings to be used with ductile-iron pipe or pipe made of other
materials with similar outside diameters for conveying water. Minimum working
pressures by size range are as follows: 3-in. through 24-in....
Back to C153/A21.53-06: American National Standard for Ductile-Iron Compact Fittings for Water Service
This standard describes 3-in. through 64-in. (76-mm through 1,600-mm)
ductile-iron compact fittings to be used with ductile-iron pipe or pipe made of other
materials with similar outside diameters for conveying water. Minimum working
pressures by size range are as follows: 3-in. through 24-in. (76-mm through
610-mm): 350 psi (2,413 kPa); 30-in. through 48-in. (762-mm through 1,219-mm):
250 psi (1,724 kPa); and, 54-in. through 64-in. (1,400-mm through 1,600-mm):
150 psi (1,034 kPa). Fittings are adequate for the rated working pressure plus a surge
allowance of 100 psi or a surge allowance of half the rated working pressure,
whichever is less.
Fittings with mechanical joints are listed in this standard for the 3-in. through
48-in. (76-mm through 1,219-mm) sizes. The standard also may be used for fittings
of these sizes with push-on joints or other joints as agreed on at the time of purchase. Fittings with push-on joints and flanged joints are listed in this standard for the
54-in. through 64-in. (1,400-mm through 1,600-mm) sizes. Fittings with flange
joints are not discussed in this standard for sizes 3 in. through 48 in. (76 mm
through 1,219 mm) because of the importance of standardized center-to-flange face
dimensions for these sizes already described in ANSI/AWWA C110/A21.10.
Fittings with plain ends are listed for bends and reducers of the 3-in. through
64-in. (76-mm through 1,600-mm) size range and for tees and crosses of the 54-in.
through 64-in. (1,400-mm through 1,600-mm) size range. The major revisions in this edition of ANSI/AWWA
C153/A21.53 are as follows:
Sec. 4.3.1.1 was revised to reference ANSI/AWWA C111/A21.11 for details
of mechanical-joint bell, plain end, and accessories, and the figure and table providing
details of the mechanical joint were deleted from this standard; and,
rejection language was removed from Sec. 5.7 and 5.8 and replaced with
Nonconformance.