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Manhole Frames & Covers.
For utilities, engineers, contractors and distributors matching the local manhole standard.
✓ Sewer, storm and water markings ✓ Price sheets for five U.S. regions
✓ Non-traffic to heavy-duty loads
Made to the local standard.
Manhole frames and covers follow the city or utility standard, often down to the pattern and the cast lettering. That is why SIGMA's heavy castings price sheets go by region, and why SIGMA takes custom orders made to your specification.
The regional sheets list ring and cover sets, covers and rings on their own, extension rings, and solid, vented and bolted watertight covers, cast with words such as SEWER, STORM, SANITARY and WATER.
Two ways to order.
Each region's heavy castings price sheet lists its manhole frames and covers. All are dated March 15, 2024. Not sure which region covers the job? Find your regional team.
Know the item number?
Find it on your region's heavy castings price sheet, then order through your waterworks distributor.
Have a spec or a drawing?
Send the standard detail or drawing to your regional team. They match it to a sheet item or quote it as a custom casting.
| Region | Regional team | Heavy castings price sheet |
|---|---|---|
|
Northeast |
Cream Ridge, NJ |
|
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Midwest |
Sauk Village, IL |
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Southeast |
Alexander City, AL |
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Southwest |
Houston, TX |
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Western |
Ontario, CA · Auburn, WA |
Every casting carries its heat number.
The heat number traces a casting to the foundry, the date and the production batch. SIGMA has inspection procedures for each castings product line, at the foundry and again at SIGMA.
5 quality steps
Inspection procedures for each castings product line, SIGMA engineers or inspectors at the foundries, material test reports, incoming inspection at SIGMA and statistical process control.
ASTM and AASHTO
Standards SIGMA works to, with federal and state department specifications, Canada's BNQ standard and the customer's own requirements.
PE certification
By an outside professional engineer, on request.
From SIGMA's November 2024 article on municipal castings.
Questions about manhole frames and covers.
Short answers. Your regional team has the rest.
The ring or frame is the casting set into the top of the manhole; the cover sits in it. SIGMA's price sheets use both words, ring and frame. You can buy them as a set, or the cover or the ring on its own.
The one your spec calls for: solid or vented, plain or bolted watertight, and cast with the word your city uses, such as SEWER, STORM, SANITARY, DRAIN or WATER. Many sheet items follow a city's or utility's own pattern, so start with your region's sheet, or send the standard detail to your regional team. Send any other project requirements with it.
Yes, as a custom order made to your specification. Send the drawing to your regional team. A new casting goes through a drawing, a sample and an approval step before production.
SIGMA castings are made for applications such as non-traffic, light, medium and heavy-duty loads. SIGMA works to ASTM and AASHTO standards, federal and state department specifications, Canada's BNQ standard and the customer's own requirements, and can have castings certified by an outside professional engineer on request. SIGMA can load-test castings at its Cream Ridge, NJ facility. Confirm the rating your spec calls for with your regional team.
The price sheets list both ductile iron and Class 35 gray iron castings. If your spec names the material, ask your regional team which items meet it.
SIGMA sells through waterworks distributors, so your price comes from your distributor. Ask your distributor or your regional team about pricing.
Have the spec in hand?
Your regional team can match it to the right frame and cover.
Headquarters, Cream Ridge, NJ