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WATER RESISTANT / WATERTIGHT APPLICATIONS:
Surface water infiltration through sanitary manholes continues to be a significant concern. We address these concerns with several self sealing applications, (O-Ring, “T” gasket and SSG) as well as bolted watertight applications. Click here to view these options in detail.

SECURITY AND SPECIAL BOLTING APPLICATIONS:
Theft, vandalism, safety and restricted access to grates and covers can be a concern. These conditions are addressed in many different ways. US Foundry offers security bolting such as; Penta-head, Buttonhead Tamperproof bolts or drill and tap service for customer supplied specialty bolts. Also available, are fixed and adjustable camlocks, and Penta-headed wedgelocks. Click here to view these options in detail.

All of these options can be utilized on most US Foundry covers frames and grates. Contact your sales or customer service representative for more information.

CONFINED SPACE / CLEAR OPENINGS:
Master manholes, Air Release and other structures that have mechanical equipment or require more frequent access often need larger clear openings to address safety, working or equipment needs. These are addressed in our “Large Manhole” sections here. These rings offer a large outer cover, coupled with a smaller inspection cover.

ADJUSTING RINGS:
Adjusting Rings are available for most ring and cover combinations. US Foundry stocks cast iron and steel Adjusting Rings in specific increments for some castings. We also have the ability to manufacture steel Adjusting Rings to size and height required for all other US Foundry and/or any other manufacturer’s ring and cover with a nominal amount of customer-supplied information. Summary of stock Adjusting Rings and ordering information on all others is shown here.

Adjusting rings can also be ordered for square, rectangular or other special applications upon request.