Plumbing fittings, namely, recirculation valves; hot water distributors being hot water heating installations; instantaneous water heaters; heating systems composed primarily of tubes, pipes and manifolds through which warm or high temperature water circulates

Gas water heaters for household use; hot water distributors being hot water heating installations; instantaneous water heaters; heating systems composed primarily of tubes, pipes and manifolds through which warm or high temperature water circulates; hot water boilers being boilers for heating installations; plumbing fittings, namely, drains for boilers; electric heat pumps