Laars Heating Systems, a Bradford White company, manufactures residential and commercial boilers and water heaters including the Mascot, Mighty Therm, and NeoTherm product lines. The brand is widely specified in hydronic heating, snow-melt, and pool-heating applications.

Legend Valve & Fitting supplies plumbing and hydronics components including ball valves, gauges, manifolds, PEX, and press fittings. The Michigan-based brand serves wholesalers across plumbing, mechanical, and HVAC contractor channels.

Lenova Sinks designs and manufactures stainless steel sinks for kitchens and bars, with deep workstation-style configurations and integrated accessories like cutting boards and colanders. The brand competes in the chef-kitchen and luxury residential market.

Little Giant Pump, a Franklin Electric brand, produces small pumps including condensate, sump, sewage, utility, and pond pumps. Its blue-housed condensate pumps are an HVAC service standard.

Lochinvar manufactures high-efficiency boilers, water heaters, and pool heaters for residential and commercial applications. Its Knight, Crest, and Armor product lines are widely specified in hydronic heating and domestic-hot-water systems.

Maax, owned by American Bath Group, manufactures bathtubs, shower bases, and shower enclosures including acrylic alcove tubs, freestanding soakers, and customizable shower kits. The Quebec-based brand sells through dealers and big-box retailers.

Maidstone manufactures hand-cast iron clawfoot bathtubs and copper soaking tubs in heritage and contemporary styles. The brand serves luxury bath remodels and historic restoration projects.

Malco Products manufactures sheet-metal hand tools used in HVAC ductwork including snips, hand seamers, crimpers, and TURBOXTools cordless tools. The Minnesota maker is a fixture in HVAC installer trucks across North America.

Matco-Norca supplies plumbing, hydronics, and waterworks products including brass valves, malleable iron fittings, gauges, and corp stops. The brand serves wholesalers across plumbing, mechanical, and waterworks distribution.

A.Y. McDonald Manufacturing produces brass plumbing valves, water meter setters, water service brass, well-pump fittings, and gas service products. Its waterworks brass is a longtime standard in municipal and well-water installations.