Water closet connector seal

Abstract

A single piece adapter is provided for use in sealing a water closet to sewer pipes of different diameters.

1 . A one piece elastic seal adapter for sealing the connections between a sewer pipe and a water closet having a discharge opening on its underside, said connection including a closet flange having a collar adapted to interconnect said water closet to a supporting floor and a tubular part extending downwardly from said collar having a radially inward facing cylindrical surface dimensioned to connect to the exterior diameter of a first sewer pipe and having a radially outward facing cylindrical surface dimensioned to connect to the interior diameter of a second sewer pipe, said elastic seal adapter comprising: 
 a flat horizontal annulus having upper and lower surfaces adapted to sealingly contact said underside of said water closet and top side of said collar of said closet flange, respectively,    a tubular portion extending downwardly from the interior diameter of said annulus, and    at least one annular flange extending radially outward from said tubular portion a sufficient distance to sealing engage the interior of a said first sewer pipe when said first sewer pipe is connected to said radially inward facing cylindrical surface of said closet flange and to sealingly engage said inward facing cylindrical surface of said tubular part of said closet flange when said interior diameter of said second sewer pipe is connected to said radially outward facing cylindrical surface of said closet flange.    
   
   
       2 . The seal adapter of  claim 1  wherein said tubular portion of said adapter includes a pair of elastic annular flange seals spaced axially from one another.  
   
   
       3 . The seal adapter of  claim 2  having a foam plastic washer shaped seal adhesively connected at it underside to said upper surface of said horizontal annulus.  
   
   
       4 . The seal adapter of  claim 3  wherein said form plastic washer shaped seal includes adhesive on its upper side adapted for sealing engagement with said underside of said water closet.  
   
   
       5 . (canceled)  
   
   
       6 . (canceled)  
   
   
       7 . (canceled)