Imperial Manufacturing Group produces HVAC accessories including pipe and duct fittings, dampers, range-hood ducting, and chimney accessories. The Canadian-headquartered company supplies HVAC wholesalers and home centers across North America.

Infinity Drain designs linear and decorative shower drains, including barrier-free curbless installations, in stainless steel and finishes ranging from satin to matte black. The brand is widely specified in luxury bath remodels and accessible designs.

InSinkErator, an Emerson business, is the world's largest manufacturer of food-waste disposers and instant-hot-water dispensers. Its Evolution and Badger lines are sold to homeowners, plumbers, and OEMs.

Intermatic produces electromechanical and digital timers, pool and spa controls, surge protectors, and lighting controls. Its T-series wall and panel-mount timers are workhorses in pool, irrigation, and outdoor lighting applications.

Irritrol Systems makes irrigation controllers, valves, rotors, and rain sensors for residential and light-commercial sprinkler systems. The brand is a long-standing fixture in landscape contractor trucks across the U.S.

Jaclo manufactures decorative bathroom and kitchen plumbing including showerheads, hand showers, body sprays, supply lines, and exposed-style trim. The New Jersey-based brand is favored for its broad finish library used in mid-to-high-end residential builds.

John Guest, a Reliance Worldwide brand, produces push-to-connect plastic and brass fittings used in plumbing, water filtration, and beverage applications. Its Speedfit and ProLock connectors are a quick-install standard for water filtration and PEX-based plumbing.

Johnson Controls is a global building-systems supplier whose HVAC brands include York, Coleman, Luxaire, and Tempstar. The company also makes building automation, fire and security, and refrigeration controls used across commercial and industrial buildings.

Josam Company manufactures commercial drainage products including floor drains, cleanouts, roof drains, and stainless trench drains. Its drainage line is specified across foodservice, healthcare, and institutional projects.

K-Rain Manufacturing produces irrigation rotors, valves, and controllers for residential and commercial sprinkler systems. The Florida-based brand competes with Hunter, Rain Bird, and Toro across the irrigation distribution network.