Patent ID: 8622090

Claim:
A blocking plumbing fitting; said fitting comprising a flexible cup element and a one way valve element depending from said flexible cup element; said cup element and said one way valve element integrally moulded of an elastomer material; said one way valve element comprising opposing elongate flexible flaps of said elastomer material; said cup element formed in at least two tiers; an uppermost one of said at least two tiers provided with an outwardly projecting lip at an upper edge of said uppermost tier; an outer diameter of said cup element conforming to inner diameters of standard waste pipe elements such that said fitting may be inserted into said waste pipe element below a waste outlet or at another desired pipe location to form an airtight seal between an outer surface and said lip of said cup element and an internal surface of said waste pipe element, and wherein said one way valve element permits liquid to pass through said waste pipe element; said one way valve element preventing passage of odours, soapsuds, vermin, noise and other undesirable elements issuing from said pipe element.