Air conditioning units for animal houses, boats, campers; Coolant recovery systems, comprising reservoirs, pumps, filters, cleaning elements; Dripper irrigation systems, comprised of valves, filters and regulators; Filters, heaters and pumps sold in combination for use in swimming pools; Heating systems for residential and commercial buildings comprised of boilers, valves, pipes, manifolds, control panel switches, and electrical wire, all sold as a unit; Lawn sprinkler systems comprising pump...