Wilkins, a Zurn brand, manufactures backflow preventers, pressure-reducing valves, and water-control valves for residential, commercial, and irrigation applications. Its 975XL and 720A valves are everyday stock for plumbing and irrigation contractors.

Williamson-Thermoflo manufactures gas, oil, and indirect water heaters and residential boilers. The Cincinnati, Ohio brand is a longtime fixture in residential heating and hot-water installations.

Yellow Jacket, a Ritchie Engineering brand, makes HVAC/R service tools including refrigerant manifolds, vacuum pumps, recovery machines, and charging cylinders. Its yellow gauges are an everyday tool on HVAC technician trucks.

York, a Johnson Controls brand, manufactures residential and commercial HVAC equipment including central air conditioners, heat pumps, gas furnaces, and chillers. The brand is one of the major HVAC equipment lines specified across the U.S.