Apparatus for purifying tap water; Bath installations; Central heating radiators; Electric light fixtures; Faucets; Floor heating apparatus; Heat sinks for use in heating apparatus; Heat sinks for use in heating, cooling and ventilating apparatus; Heat-stabilized polypropylene pipes for heating installations; Heating installations; Heating systems composed primarily of tubes, pipes and manifolds through which warm or high temperature water circulates; Heating systems composed primarily of tub...