Seekonk Precision Tools, founded over 75 years ago and headquartered in Seekonk, Massachusetts, is an ISO-9001 manufacturer of made-in-USA torque wrenches, screwdrivers, and specialty hand tools. The company is known for pre-set, adjustable, and click-type torque tools widely used in plumbing, aerospace, and precision-fastening applications.
SharkBite is the flagship push-to-connect plumbing fittings brand of Reliance Worldwide Corporation, headquartered in Atlanta, Georgia. Its color-coded brass and polymer fittings install on copper, PEX, CPVC, and PE-RT without solder, glue, or special tools — making SharkBite the leading DIY and pro PTC line in North America.
Sigma, founded in 1986 and operated by American Faucet and Coatings Corporation from a 60,000-sq-ft facility in Vista, California, is a luxury and bespoke custom-faucet maker. The brand is renowned among designers for traditional, transitional, and contemporary kitchen, bath, and shower fixtures available in 105 hand-applied finishes.
Sioux Chief Manufacturing, founded in 1957 and headquartered in Kansas City, Missouri (with operations in Peculiar, MO), is a family-owned American maker of rough plumbing products. Its lines include closet flanges, water-hammer arresters, floor drains, PEX tubing, outlet boxes, and trench drain systems for residential, commercial, and industrial use.
Sloan Valve Company is an American manufacturer of commercial restroom fixtures, headquartered in Franklin Park, Illinois. Founded in 1906 by William Elvis Sloan in Chicago, the company pioneered the Royal flushometer and remains the industry leader in flushometers, sensor faucets, and water-efficient restroom systems.
Spears Manufacturing Co. is a leading U.S. producer of PVC and CPVC plastic pipe fittings, valves, and fire-sprinkler products, headquartered in Sylmar, California. Founded in 1969 by Wayne Spears, the ISO 9001-certified company operates roughly nine nationwide facilities and is recognized for FlameGuard CPVC and Schedule 40/80 fittings.
Stiebel Eltron is a German manufacturer of tankless electric water heaters, heat pumps, and renewable energy systems, founded in 1924 by Dr. Theodor Stiebel. Global HQ is in Holzminden, Germany, with U.S. HQ in West Hatfield, Massachusetts. The brand is a world leader in point-of-use and whole-house tankless heating.
Taco Comfort Solutions (Taco, Inc.) is a third-generation, family-owned American manufacturer of hydronic heating and cooling components, headquartered in Cranston, Rhode Island. The company is best known for its circulator pumps, valves, controls, air-dirt separators, and packaged hydronic systems for residential and commercial applications.
Tecsun Building Products (Federal Tecsun, Inc.) is a manufacturer and distributor of laminate, hardwood, bamboo, and engineered luxury vinyl flooring, headquartered in City of Industry, California. Note: research suggests Tecsun specializes in flooring rather than plumbing/PEX — please verify this is the intended brand.
ThermaSol is a U.S. manufacturer of residential steam-shower generators, smart shower controls, and wellness/spa products, founded in 1958 and now part of the Finnish Harvia sauna group. Headquartered in Round Rock, Texas, ThermaSol pioneered the home steam shower and is known for its PRO Series III generators and FastStart technology.
The Splash Lab designs luxury commercial washroom fixtures, modular bathroom systems, and the award-winning Monolith Basin. Founded in 2014 and headquartered in Culver City, California (with UK operations), the firm is known for custom restroom installations at Apple Park, Google, Netflix, and Heathrow.
Thunderbird Products is a U.S. manufacturer of copper and stainless steel roof drains, deck drains, vents, scuppers, and flashings used in commercial and residential plumbing/roofing systems. Note: research did not turn up a strong plumbing-specific brand confirmation — please verify this is the intended Thunderbird.
Toolceptions, Inc. designs innovative specialty plumbing tools including the Ferrule Blaster, TubTwista, ArmTwista, and PlugTwista. Founded in 2015 by plumber Adam Abrams and based in California, the company focuses on extraction and installation tools that save plumbing professionals time on stuck or broken fittings.
TracPipe is the flagship CSST (corrugated stainless steel tubing) flexible gas piping system manufactured by Omega Flex, Inc., headquartered in Exton, Pennsylvania. Established in 1975, OmegaFlex is a leading innovator in flexible metal hose and piping; TracPipe and TracPipe CounterStrike are widely used for residential and commercial gas installations.
Trim to the Trade is a U.S. manufacturer of decorative plumbing specialty trim — bath waste-and-overflows, P-traps, supply kits, and stops — in finishes such as Flat Black, Satin Gold, and Light Brushed Bronze. Founded in 1950 and headquartered in Palm Desert, California, the company sells exclusively through the plumbing trade.
T&S Brass and Bronze Works is a family-owned U.S. manufacturer of commercial faucets, pre-rinse units, and plumbing fittings, headquartered in Travelers Rest, South Carolina. Founded in 1947 by George Theisen and Carl Spatt, the company invented the foodservice pre-rinse unit and serves restaurant, laboratory, healthcare, and institutional markets.
TurboTorch, part of the ESAB family of brands, manufactures air-fuel and oxy-fuel torches, tips, and accessories used in HVAC, plumbing, and refrigeration brazing/soldering. Operated under ESAB (HQ in North Bethesda, Maryland), TurboTorch is known for its swirl-combustion torch technology that produces a hotter, more efficient flame.
United Pipe & Steel is the leading U.S. master distributor of domestic and imported steel pipe, copper tubing, PVC, and electrical conduit to wholesale distributors. Headquartered in Ipswich, Massachusetts, and a subsidiary of Reliance, Inc., it serves plumbing, PVF, HVAC, waterworks, and fire protection markets from 12+ locations.
Uponor is a leading manufacturer of PEX-a crosslinked polyethylene pipe and ProPEX expansion fittings for residential and commercial plumbing, radiant heating, and cooling. Founded in 1918 in Finland, its North American HQ is in Apple Valley, Minnesota; since November 2023 it has been part of the Georg Fischer Group.
Viega is the inventor of modern press-connection technology and manufactures ProPress, MegaPress, and PureFlow press fittings plus PEX systems for plumbing, hydronic heating, and industrial piping. North American HQ is in Broomfield, Colorado (parent company in Attendorn, Germany), serving residential, commercial, industrial, and marine markets.
Ward Manufacturing, founded in 1924 in Blossburg, Pennsylvania, is a longstanding U.S. foundry producing malleable iron and cast iron pipe fittings, nipples, Wardlox, and Teelox products. It was acquired by ASC Engineered Solutions in January 2024 and remains an industry-standard brand for threaded iron fittings.
Watts Water Technologies, founded 1874 and headquartered in North Andover, Massachusetts, manufactures a broad portfolio of water-management products: pressure regulators, backflow preventers, drainage, water-heater expansion tanks, hydronics, and water-quality systems for plumbing, heating, and HVAC.
Westlake Pipe & Fittings (formerly NAPCO/North American Pipe and LASCO Fittings) is one of North America's largest PVC pipe and fittings manufacturers, operating 23 facilities. A division of Westlake Corporation (HQ in Houston, Texas), it serves municipal water, sewer, plumbing, electrical, well, irrigation, and HVAC venting markets.
Victory White Metal Company has manufactured lead-free plumbing solders, leaded solders, pewter, babbitts, anodes, and lead castings since 1920 from Cleveland, Ohio. Its NSF/ANSI 61-certified lead-free plumbing solders meet Safe Drinking Water Act requirements and are widely used for copper potable-water systems and HVAC.
Zilmet USA is the North American arm of Italy's Zilmet (founded 1955, Padua), the world's largest manufacturer of expansion tanks and a global leader in heat exchangers. In 2025 Zilmet USA opened a 150,000-sq.-ft. HQ and manufacturing plant in Georgetown, South Carolina, producing thermal, hydronic, solar, and well-water expansion tanks.