SSI Sealing Systems, Inc.
- Manufacture and distribute products to prevent inflow and infiltration in manholes, catch basins, and pipe joints.
- http://www.ssisealingsystems.com

McElroy Manufacturing, Inc.
- Manufacturer of HDPE polyethylene plastic pipe heat fusion equipment, fintubes and finned tube equipment, and mobile directional control valves technologies.
- http://www.mcelroymfg.com/

Inserta Tee
- Manufactures a three piece service connection consisting of a PVC hub, rubber sleeve and steel band used for tapping into sewer pipes of plastic, steel and concrete.
- http://www.insertatee.com/

Multi Fittings
- Manufacture plastic and composite pipe and fitting systems for the municipal, industrial and irrigation markets.
- http://www.multifittings.com/

General Flange & Forge Corporation
- Manufacturer of flanges in carbon steel, stainless and alloys as well as galvanized flanges and orifice unions. DIN/Metric/JIS flanges.
- http://generalflange.com

National Steel Products Co. Ltd.
- Manufacturer of malleable fittings, flanges and butt-weld fittings.
- http://www.designmaker.com/national-steel-products/malleable_iron_fittings.htm

Star Pipe Products
- Global manufacturer and supplier for a broad array of pipe fittings and pipe fitting accessories.
- http://www.starpipeproducts.com

Lancashire Fittings
- Manufacturers and distributors of stainless steel pipe fittings, valves, flanges, repair clamps, instrumentation fittings, tube and pipe.
- http://www.lancs-fittings.co.uk/

Assured Flow Sales, Inc.
- Manufacture pressure-rated, ductile iron, cement-lined, tar-coated fitting designed to connect fire hydrants to gate valves and water mains.
- http://www.gradelok.com/

Advanced Support Products, Inc.
- Custom design and manufacture support systems for the mounting of equipment, piping or any structure on roof systems or raw land sites.
- http://www.aspbase.com/

Texas Pipe Works Inc.
- Manufacture and distribute pipe couplings including merchant, water well , UL conduit and drive shoe couplings.
- http://www.texaspipeworks.com/