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Treatment Plant Products.

For distributors, contractors and engineers on water and wastewater treatment plant jobs.

✓ Bid tracking, quotes and spec help         ✓ Phased releases

Pick the product.

Mostly the same products as line work, with more flanged fittings, more drawings and coatings matched to the service.

Customers call it plant work or treatment plant work; SIGMA's plant team is also known as the treatment plant division.

SIGMA C110 flanged 45 degree bend

Flanged and MJ fittings

Mostly flanged fittings on plant jobs, plus C153 and C110 MJ fittings.

Flanged 2 to 64 in. · 54 in. and up made per AWWA C153

View ductile iron fittings ›

ONE-LOK SLDE wedge-action restraint gland in a large size

ONE-LOK SLDE restraints

Wedge-action restraint for mechanical joints on ductile iron pipe.

SLDE 3 to 64 in.

View ONE-LOK SLDE ›

PV-LOK clamping ring for PVC pipe

PVC pipe restraints

PV-LOK serrated restraints and ONE-LOK SLCE wedge-action restraint for PVC pipe.

PV-LOK 2 to 48 in. · SLCE 3 to 60 in.

View PVC restraints ›

SFUP flange adapter joining pipe to a flanged fitting, catalog render

SIGMAFlange Universal (SFUP)

Flange adapter that restrains plain-end pipe at a flange on ductile iron, C900 PVC, steel and IPS PVC pipe.

3 to 36 in. on ductile iron

View SFUP ›

Red rubber full face flange gaskets, with bolt holes

FLANGE-PAK

Flange gasket and bolt packs for flanged joints, with plain, zinc plated or stainless 304 hardware. Other bolting a spec calls for is quoted per job.

2 to 48 in.

View FLANGE-PAK ›

Drawing of a fitting wall: asphaltic coating, iron, cement lining and seal coat

Coatings and linings

Bare, standard, FBE, ceramic epoxy lined and zinc coated fittings are on SIGMA price lists. Custom coatings and linings are quoted per job.

Send the coating and lining spec with the RFQ

View coatings and linings ›

How a plant job runs.

Before the bid. The team tracks plant projects, often months ahead. Send your RFQ to sigmaplant@sigmaco.com with the specs, the bid date and the date you need the quote back.

The quote. The plant team reviews the specs and quotes everything SIGMA can supply.

After award. One project manager coordinates drawings, special bolting and each phased release, and keeps you posted on ETAs.

Flanged ductile iron pipe on pipe supports and a large flanged bend at a pump station site, with concrete structures behind

64 in.

ONE-LOK SLDE restraints for ductile iron pipe are on the price list from 3 to 64 in. Sizes 54 in. and up are priced on request.

60 in.

ONE-LOK SLCE restraints for PVC pipe are on the price list from 3 to 60 in. Sizes 54 in. and up are priced on request.

Sizes from SIGMA's restraint price list PL2024-1.

Price lists and spec sheet.

List prices by item number for the products plant jobs use most. Domestic lists are on the Domestic Products page, and every coating list is on the Coatings and Linings page.

Import Fittings price list

C153 MJ, C110 MJ, C110 flanged and C153 push-on fittings, standard or bare. Effective 1/5/2026

Import Restraint Products price list

ONE-LOK SLDE and SLCE, PV-LOK and SFUP. PL2024-1, effective 12/9/2024, rev. 4/14/2026

Document Covers

Fusion bonded epoxy (FBE): C153 MJ, C110 MJ, C110 flanged, C153 push-on

Ceramic epoxy lined: C153 MJ, C110 MJ, C110 flanged

SIGMA Z-COAT: C153 MJ, C110 MJ, C110 flanged, C153 push-on

Gasket, bolts and nuts; bolt count and weight by size

Questions about plant work.

Short answers. Email the plant team for the rest.

Matt Levyssohn and Char Blubaugh, the plant team's project managers. Matt covers the Northeast, Midwest, Southwest and West Coast; Char covers the Southeast. RFQs go to the team inbox, sigmaplant@sigmaco.com, and Matt or Char reviews each one. For questions on a quote, call 800.999.2550 and ask for the plant team.

Have a plant job to quote?

The plant team quotes from your specs. For line work, your regional team can help.