Faucets; Air valves for steam heating installations; Cocks for pipes and pipelines being parts of sanitary installations; Disinfectant apparatus for dispensing solutions into water-pipes for sanitary installations; Heating installations; Heating systems for residential and commercial buildings comprised of boilers, valves, pipes, manifolds, control panel switches, and electrical wire, all sold as a unit; Mixer faucets for water pipes; Mixer taps for water pipes; Pipes being parts of sanitary ...