Extruded plastic jointing strips; packing, stopping, and insulating materials including reflective foils and fibrous materials; waterproof packings; weatherstripping; jointing materials and compounds in this class including moisture resistant jointing compounds, base coat jointing compounds and top coat jointing compounds in both premixed and powder forms; non-metallic junctions including elbows, tee, jointers, adapters, connectors, brazing tails, test plugs, and clamp rings; sealing rings; rubber rings used in pressure applications; items formed from plastic materials for use in installing walls or ceilings; pipes, not of metal; fittings, joints and couplings for pipes in this class