K-Flex USA manufactures elastomeric and polyethylene-based flexible foam insulation products for HVAC/R, plumbing, solar, industrial, and acoustic applications. As the North American division of Italy-based L'Isolante K-Flex, the company is headquartered in Youngsville, North Carolina, and is a leader in closed-cell flexible insulation.
Kingston Brass manufactures handcrafted kitchen and bath fixtures including faucets, shower systems, tub fillers, and accessories built from solid brass and stainless steel. Founded in 1998 and headquartered in Chino, California, the company is known for combining traditional craftsmanship with modern design across an extensive product portfolio.
Kissler & Co. distributes plumbing repair parts including faucet stems, cartridges, handles, toilet repair components, escutcheons, supply hoses, and OEM parts for brands like Delta, Sloan, American Standard, and Kohler. Founded in 1923 and based in Longwood, Florida (with NJ roots), Kissler is a century-old leader in plumbing repair parts.
Krowne is a U.S. manufacturer of stainless-steel underbar systems, backbar refrigeration, foodservice and bar faucets, gas connectors, hand sinks, casters, and replacement plumbing parts. Founded over 70 years ago and headquartered in Wayne, New Jersey, the family-owned company is known for its FaucetFlex configurator and bar equipment.
LA-CO Industries, founded 1934 and headquartered in Elk Grove Village, Illinois, manufactures industrial hand-held markers (Markal brand), plumbing/HVAC chemicals (LA-CO pipe-joint compounds), temperature indicators (Tempil), and livestock-identification products (All-Weather). It sells through 6,500 distributors across 25+ countries.
Lavelle Industries, headquartered in Burlington, Wisconsin, is a 100-year-old U.S. rubber and plastics manufacturer producing toilet trim, flush valves, and flappers — including the Korky brand, makers of the world's first toilet flapper and the #1-selling flapper in the U.S. Its Chlorazone rubber is NSF/ANSI 61 certified.
Legend Valve & Fitting, headquartered in Auburn Hills, Michigan, has manufactured valves, fittings, tubing, and components for plumbing and hydronic systems since 1988. The employee-owned company offers more than 10,000 products across 90+ classes, including its LegendPress, ClearLOC, and HyperPure product lines.
Both are Stanley Black & Decker tool brands. LENOX, founded 1915 in East Longmeadow, Massachusetts, specializes in saw blades, hole saws, and cutting tools. DEWALT, founded 1924 by Raymond DeWalt, is renowned for its yellow-and-black professional power tools and jobsite equipment.
L.H. Dottie, founded 1965 and headquartered in Commerce, California, is a family-owned manufacturer and distributor of fasteners and hardware for the electrical, plumbing, HVAC, and security industries. The 60-year-old company operates a 50,000-sq-ft Los Angeles distribution center plus warehouses in Philadelphia and Oklahoma City.
Liberty Pumps is a family- and employee-owned U.S. manufacturer headquartered in Bergen, New York, founded in 1965. It specializes in sump pumps, sewage pumps, grinder pumps, effluent pumps, and pre-assembled sewage packages for residential and commercial groundwater and wastewater removal applications.
Little Firefighter designs, builds, and supports earthquake/seismic automatic gas shut-off valves in the USA. Sized 3/4-inch through 6-inch for residential, commercial, and industrial applications, the valves trigger at 5.4-magnitude or greater and are CSA-approved and listed by the City of Los Angeles and State of California.
LIXIL is a Tokyo-headquartered global building-materials and housing-equipment company and the parent of American Standard, GROHE, INAX, JAXSON, and Cobra. Its LIXIL Water Technology Americas division (HQ Piscataway, New Jersey) sells faucets, toilets, showers, and bath fixtures across North and South America.
LSP Products Group, headquartered in Irving, Texas (manufacturing in Monterrey, Mexico), was founded by plumbers over 50 years ago. It specializes in washing-machine outlet boxes, ice-maker boxes, gas boxes, and fire-rated outlet boxes — including its universal One Stop Box platform — for the new-construction plumbing/mechanical contractor market.
MAC Faucets, founded in 2002 and based in Southern California (Paramount/Long Beach area), is a U.S. manufacturer of commercial and luxury touchless/automatic infrared-sensor faucets, soap dispensers, and flush valves. It pioneered the "decorative automatic faucet" category with its Autoluxe line and offers products in 20+ finishes.
Matco-Norca is a leading supplier of plumbing and PVF (pipe, valves, fittings) products including 2-piece valves, brass and bronze fittings, and pipe nipples. Founded in 1952 and headquartered in Brewster, New York.
MCC Powers (now Powers, a division of Watts Water Technologies) manufactures thermostatic mixing valves, shower trim, water-tempering controls, and process-control valves. Headquartered in North Andover, Massachusetts, Powers is best known for anti-scald and master mixing valves used across commercial plumbing.
Midland Industries is a major North American manufacturer and distributor of brass fittings, valves, clamps, tubing, and plumbing accessories, with roots going back to 1919. Headquartered in Kansas City, Missouri, the company offers a broad MAF/USA brass-fittings line plus lead-free, pneumatic, hydraulic, and stainless-steel adapter offerings.
MIFAB is a manufacturer of commercial and industrial plumbing and drainage products including floor and roof drains, cleanouts, fixture carriers, floor sinks, interceptors, and access doors. Founded in 1982 and headquartered in Chicago, Illinois, MIFAB is noted for pioneering cast stainless steel drains as an alternative to nickel bronze.
The Mill-Rose Company is the largest U.S. manufacturer of twisted-wire brushes and a leading maker of plumbing prep tools through its Clean-Fit Products division, including pipe brushes, sealant tapes, and Blue Monster thread sealants. Founded in 1919 and headquartered in Mentor, Ohio.
Milwaukee Tool is a leading manufacturer of heavy-duty power tools, hand tools, accessories, and storage solutions for professional trades including plumbing, electrical, and construction. Founded in 1924 and headquartered in Brookfield, Wisconsin, the company is a subsidiary of Techtronic Industries and is known for its red M18 and M12 cordless platforms.
Minerallac Company is a family-owned manufacturer of electrical construction hardware including conduit hangers, one-hole straps, beam clamps, anchors, fasteners, and box-support accessories. Founded in 1894 and headquartered in Hampshire, Illinois, Minerallac celebrates over 125 years and operates a 100% solar-powered facility.
Mission Rubber manufactures professional-grade DWV and municipal rubber couplings, including the BAND-SEAL specialty line, for connecting, adapting, reducing, or repairing virtually any pipe type. Founded in 1958 and headquartered in Corona, California (a unit of MCP Industries), it specializes in code-approved transition couplings.
Moen is North America's leading faucet brand, founded in 1937 by inventor Alfred M. Moen, who pioneered the single-handle mixing faucet. Headquartered in North Olmsted, Ohio, it operates as a principal subsidiary of Fortune Brands Innovations and manufactures kitchen and bath faucets, showerheads, sinks, and accessories.
Founded in 1997 and based in Dallas, Texas, Mountain Plumbing Products manufactures high-performance water appliances including instant hot water tanks, water chillers, filtration systems, waste disposers, and plumbing accessories. The company operates a 50,000-square-foot facility and is a division of McAlpine and Company, Ltd.
Mr. Steam, a brand of Sussman-Automatic Corporation, manufactures residential and commercial steam shower generators, controls, and spa accessories such as aromatherapy and chromotherapy systems. Founded in 1917 and headquartered in Long Island City, New York, it is a recognized specialist in home steam-bath wellness products.