HP LOK® Pipe and Fittings

U.S. Pipe now offers a 350 psi joint in 30" to 64" sizes!

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  • HP LOK Restrained Joint

    HP LOK Restrained Joint Pipe and Fittings provide flexible push-on joints for 30"– 64" pipe sizes. The HP LOK Restrained Joint has a working pressure equivalent to the working pressure rating of the parent pipe with a maximum working pressure rating of 350 psi.

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  • TYTON® Gasket

    U.S. Pipe’s TYTON® Gasket is used in U.S. Pipe’s TYTON JOINT® and HP LOK® Joint Ductile Iron Pipe & Fittings. It is a circular rubber gasket which has a modified bulb shape in cross section. The TYTON® Gasket conforms to ANSI/AWWA C111/A21.11. Composition and dimensions of the gasket have been carefully engineered to ensure a water-tight and lasting seal.

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  • PRESSURE CLASS / THICKNESS CLASS

    TYTON JOINT®, FIELD LOK 350® and FLANGE TYTE® Gaskets meet the specifications, performance requirements and pressure ratings in accordance with standard: ANSI/AWWA C111/A21.11-Rubber-Gaskets Joints for Ductile-Iron Pressure Pipe and Fittings.

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  • HP LOK® Field Weld

    This brochure describes the procedure to be used in applying a field weld bar to the plain end of field-cut HP LOK® Pipe. The weld bar is an integral component of the HP LOK Joint Restraint system. As such, it is to be applied with careful adherence to this procedure for proper performance. This procedure should only be applied by welders qualified in the skill of Shielded Metal Arc Welding (SMAW).

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  • MJ HARNESS LOK

    View and/or download to see U.S. Pipe's restrained mechanical joint alternative to friction MJ restraint systems.

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  • TR FLEX® and HP LOK® Telescoping Sleeves 4"-64"

    U.S. Pipe Telescoping Sleeves are Ductile Iron restrained joint fittings which can be utilized to provide expansion and contraction capability in a pipeline. Telescoping sleeves are available with TR FLEX ends for 4" through 24" sizes and with HP LOK ends for 30" through 64" sizes. The restrained joints of the telescoping sleeves are suitable for 350psi operating pressure in all sizes. Standard lining and coating is a petroleum asphaltic material.

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Product Information


HP LOK® Assembly
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