We make water work.

SIGMA Waterworks supplies the parts that make water and wastewater systems work, from fittings and restraints to castings, meter boxes and field essentials.

See what we supply

SIGMA Corporation is now SIGMA Waterworks. What changed

We don't make the pipe.
We make it work.

Fittings, restraints and flange adapters at each joint. Hydrant buries, castings and meter boxes up to street level. Field essentials to finish the job.

40

years

Tried and tested on water and wastewater systems.

12

product families

From ductile iron fittings to meter boxes and enclosures.
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From the plant to the meter.

Follow the water from treatment plant to curbside meter, and see the SIGMA parts along the way. Scroll, or pick a stop.

  1. Fittings, restraints and coatings for water and wastewater treatment plant work.

    Treatment Plant Products Coatings and Linings
    Flanged ductile iron bend cast with the SIGMA name, installed in a pump station

  2. Compact C153 and full body C110 ductile iron fittings with mechanical joint, push-on or flanged ends.

    Ductile Iron Fittings Domestic Products
    Zinc-coated ductile iron mechanical joint bends on a pallet

  3. At bends, tees and dead ends, water pressure pushes joints apart. ONE-LOK and PV-LOK restraints hold them together.

    Ductile Iron Pipe Restraints PVC Pipe Restraints
    Two crew members installing a restraint on blue PVC pipe

  4. Flange adapters join pipe to flanged valves and fittings. Accessory packs complete mechanical and flanged joints.

    Flange Adapters Gaskets and Accessories
    Red fusion bonded epoxy MJ fitting joined to blue PVC pipe on a flatbed trailer

  5. Valve boxes, frames and covers give crews access. Hydrant buries and extensions bring wet-barrel hydrants to grade.

    Municipal Castings Hydrant Buries and Extensions
    Cast iron valve box and cover marked WATER

  6. Meter boxes, lids, pits and vaults that house water meters and valves.

    Meter Boxes and Enclosures
    Blue meter box lid with the SIGMA name and a round opening

  7. Polywrap, marking tape, tracer wire, pipe lube, valve keys, clamps, rods and plugs.

    Field Essentials
    Pipe wrapped in polyethylene encasement in a trench
A water system from the treatment plant to the meter Schematic of a buried water main leaving a treatment plant, passing a tee, dipping under a crossing on restrained bends, running through a valve, past a fire hydrant, with a service line into a meter box beside a house. Marking tape and tracer wire run above the main. Numbered points match the seven stops. TREATMENT PLANT STREET VALVE BOX HYDRANT METER WATER MAIN MARKING TAPE TRACER WIRE 1 2 3 4 5 6 7
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One commitment,
kept five ways.

The promise behind every SIGMA part, and every call to our team.

Quality.

What we supply gets buried and has to hold. Quality you can count on.

Service.

Real people answer the phone and solve problems mid-job.

Safety.

Everyone goes home the way they arrived.

People.

Customers know us by name, and careers here run long.

Delivered.

We do what we said, when we said.

The paperwork,
one click away.

Submittals, price lists, technical library and Restraint Calculator, all in one place.

Submittals

Submittal sheets for the spec package.

Open submittals

Price lists

For quoting SIGMA products.

Open price lists

Technical library

Catalogs, install guides and bulletins.

Open the library

Restraint Calculator

How much pipe to restrain at each fitting.

Open the calculator

The SIGMA name cast into a ductile iron fitting

New name.
Same SIGMA.

Formerly SIGMA Corporation. Here's what that means when you call or order.

What changed.

Our name, our look and this website. sigmaco.com now forwards here.

What didn't.

Your SIGMA contacts, the products you order and our main line, 800.999.2550.

What's growing.

Our product line: meter boxes, vaults and castings, beside the fittings and restraints you know.

Our story

Real people. Real answers.

Each region has its own SIGMA team, in the office and in the field, with engineering behind them.

Inside sales
Quotes, orders, alternates and documents for your region.
Territory sales managers
In the field, working with the distributors in your area.
Engineering
Backup on submittals, specs and restraint lengths.
Find Your Regional Team
SIGMA team member working at a computer
Two SIGMA team members in high-visibility shirts working at a shop bench

Questions on a job?

Pick a state or province to see your regional team.

Find my team

Or call our main line 800.999.2550