Elkay manufactures stainless steel sinks, kitchen and bath faucets, drinking fountains, and bottle-filling stations for residential and commercial markets. Its commercial drinking-water products are widely specified in schools, airports, and offices.

Empire Industries supplies fire-protection components and fittings used in commercial sprinkler systems. Its product line includes inspector test connections, drain assemblies, and related accessories for fire suppression installations.

Esmark Steel Group is a steel processor and distributor supplying coil, sheet, and plate to HVAC, ductwork, and equipment manufacturers. The brand serves OEMs and mechanical fabricators across the eastern U.S.

EWC Controls manufactures zone-control systems, dampers, and balancing actuators that allow forced-air HVAC systems to deliver independent comfort to multiple zones. Its retrofit and OEM products are stocked by HVAC wholesalers nationwide.

EZ-Flo makes fertilizer and chemical injection systems for landscape irrigation, allowing fertigation through existing sprinkler systems. The brand also produces residential and commercial chemical-feed accessories.

Fantech, a Systemair brand, designs inline duct fans, exhaust ventilators, and indoor air-quality equipment including HRV/ERV systems and bath fans. Its quiet, high-performance fans are specified by mechanical engineers and IAQ specialists.

Febco, a Watts Water Technologies brand, makes backflow prevention assemblies including reduced pressure zone, double check, and pressure vacuum breaker valves. Its devices protect potable water from cross-connection contamination in commercial, residential, and irrigation systems.

Fieldpiece Instruments designs HVAC/R service tools including digital manifolds, leak detectors, anemometers, and clamp meters. Its modular SMAN and Job Link series are popular among service technicians for diagnostic accuracy and Bluetooth reporting.

Fleurco designs glass shower doors, enclosures, and base configurations including frameless, semi-frameless, and steam-shower options. The Canadian manufacturer ships to bath dealers throughout North America.

Flexcon Industries makes pressure tanks, expansion tanks, and accessories for well water, hydronic, and potable-water systems. Its pre-pressurized diaphragm tanks are a common alternative across residential plumbing and heating channels.