Fastite®, Flex-Ring®, Lok-Ring® Fittings

For more information on Fastite, Flex-Ring, and Lok-Ring fittings, please select from the choices on the right.

The principal standards covering fittings are ANSI/AWWA C110/A21.10 and ANSI/AWWA C153/A21.53. The principal standard covering joints is ANSI/AWWA C111/A21.11. These and other standards are referenced throughout this Section by the full ANSI/AWWA designation or by only the AWWA numbering, such as AWWA C110 or C153.

AMERICAN furnishes a complete line of 4"-64" Fastite, 4"-48" Flex-Ring, and 48"-64" Lok-Ring fittings meeting the applicable requirements of AWWA C110 or C153, depending on diameter and joint. These fittings all employ the standard Fastite or Fast-Grip gasket seal and the joints meet the applicable requirements of AWWA C111. Many of these fittings are not specifically listed in the AWWA standards because of joints, outlets, or other variations, and are designated as "AMERICAN Standard."

Fastite fittings are used extensively in underground service with Fastite joint pipe. Because they are boltless, less labor intensive, ergonomically friendly, and because joint restraint can be facilitated in the field by using AMERICAN's Fast-Grip® gasket in the 4"-30" sizes, they are gaining popularity over standard mechanical joint fittings.

When welded joint restraint is desired, Flex-Ring or Lok-Ring fittings can also be used, depending on size. These joints are also essentially boltless and use the standard Fastite gasket for joint sealing. Additionally, field adaptable joint restraint is available for 4"-30" Fastite and 14"-36" Flex-Ring by use of AMERICAN's Fast-Grip gaskets or Field Flex-Rings, respectively. See Restrained Joints (Section 9) for more information.

Fastite, Flex-Ring, and Lok-Ring fittings are normally furnished complete with standard Fastite plain rubber gaskets and a sufficient supply of Fastite joint lubricant. Restraining elements for Flex-Ring or Lok-Ring fittings may be shipped either with the fittings or joining pipe, dependent on joint type, fitting configuration, etc. See Restrained Joints (Section 9) for more information.

All sizes of Fastite, Flex-Ring and Lok-Ring fittings are furnished ductile iron only. Fittings for pressure ratings of 250 and 350 psi are furnished as shown in the tables in this Section. Fittings for pressure ratings higher than shown are available for special applications.

4"-16" Fastite fittings are furnished fusion-bonded-epoxy (FBE) coated and lined only. The FBE coating/lining meets the applicable requirements of AWWA C116, and both FBE and cement linings are ANSI/NSF Standard 61 certified for contact with potable water.

All other fittings are normally furnished with cement lining in accordance with AWWA C104 and with an outside asphaltic coating. They can also be furnished asphaltic coated or uncoated inside. For special conditions, other types of coatings and linings may be available. See Linings and Coatings (Section 11) for more information.

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