Patent ID: 7246386

Claim:
A urinal outlet assembly for connecting the outlet of a urinal to a waste pipe comprising: a waste outlet connected to an opening in the bottom of a urinal basin; a liquid seal odor trap having one end connected to said waste pipe, and another end connected by an internal pipe to said waste outlet; and a replaceable cylindrical insert inserted through said opening in said urinal basin, said cylindrical insert having an upper end and an open bottom end, said cylindrical insert extending from said waste outlet into said internal pipe and into said liquid seal odor trap internal pipe, said open bottom end of said cylindrical insert extending into and contacting liquid in said liquid seal odor trap when in use, said cylindrical insert forming a substantially internal smooth surface for liquids which flow between said waste outlet and said liquid seal odor trap, and said cylindrical insert forming a close radial fit against inner surfaces of said waste outlet at said upper end and against inner surfaces of said internal pipe at said open bottom end, thereby preventing liquid from contacting said inner surfaces of said waste outlet and of said internal pipe, and preventing the formation of salts in said inner surfaces of said waste outlet and of said internal pipe.