Hygienic self sealing trap with one way valve comprising two substantially flat abutting surfaces of elastomeric material

摘要

A method for installing a wastewater drain, by mounting and securing a flexible elastomeric body that acts as a one-way valve, shaped with an outer flange and shaped to transition from circular to end in two parallel flexible resilient flaps mounted within a tube that attaches or connects using engaging screw threads to the drain entrance.