1. Fittings in this section with the heading “ANSI/AWWA C153/A21.53” are essentially as specified in that standard. Fittings in tables with the heading “AMERICAN Standard” are either not included in the ANSI/AWWA Standard or vary from it in weights, dimensions and/or joints.
2. Fittings are manufactured of ductile iron qualified as per grade 70-50-05 (minimum tensile strength: 70,000 psi; minimum yield strength: 50,000 psi; minimum elongation: 5%) as specified in AWWA C110 and C153.
3. Weights of accessories are not included in weights of fittings shown in tables unless specifically noted. For weights of accessories, see those specific product sections on this website.
4. For allowable joint deflection of Fastite, Flex-Ring and Lok-Ring fitting joints, see those specific product sections on this website.
5. All pressure ratings are for water service.
6. Some fittings are available with body metal thickness and weights other than shown in the tables. Some fittings are available in different sizes and with different size combinations than shown. All sizes and body metal thicknesses listed may not be available due to equipment changes. Consult AMERICAN regarding special requirements.
7. Fittings may be furnished by AMERICAN that are manufactured by others. Any such fittings will normally be manufactured in accordance with appropriate ANSI/AWWA standards.
8. The 250 psi rating for 54"-64" fittings is an AMERICAN Standard, based on performance testing. 54"-64" fittings are rated only 150 psi in AWWA C153, although that standard provides for higher pressure ratings by the manufacturer. Consult AMERICAN if that is desired.
9. Center-to-socket dimensions, wall thicknesses and weights may vary from those shown in this section, depending on foundry practice.
10. Use nomenclature from flanged fittings if you need to specify a tap, boss or base location on a Fastite, Flex-Ring or Lok-Ring fitting.
11. 11. Lateral or wye branch fittings with Fastite, Flex-Ring and Lok-Ring end connections are not shown in this section. For small-diameter varied angle lateral and tangential connections to larger mains, shop-welded outlet pipes are normally preferable and can be furnished with all joining connections as noted in the Fabricated Items section of the website. For larger or full-opening requirements, some 45° lateral and true wye configurations can also be furnished with these push-on end connections. (Contact AMERICAN for availability.) These wye fittings are special, and for economy and availability, alternative combinations of other standard fittings may be preferable in some cases. (See Configuration Alternatives as for flanged fittings or mechanical joint fittings.)
12. AMERICAN Flex-Ring and Lok-Ring fittings will work as push-on unrestrained fittings as well (as “Fastite” without restraint rings and/or spigot weldments), as long as suitable external restraint (thrust blocks, etc.) is applied. Flex-Ring and Lok-Ring fittings are thus furnished as “Fastite” fittings in many sizes and configurations, at Foundry option.

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