Patent ID: RE39721

Claim:
A discharge outlet for a double walled containment tank having an inner tank having a chamber for receiving liquid therein and a port for the passage of liquid therethrough, and an outer containment vessel having an access opening aligned with the port, the inner tank and the outer containment vessel defining a containment area therebetween, said discharge outlet comprising: a conduit fluidically coupled to the inner tank; a flexible, annular sealing member positioned between the inner tank and the outer containment vessel in substantial alignment with the port and the access opening in surrounding relationship to said conduit , said sealing member presenting a pair of opposed holes, one of said holes being of substantially greater diameter than the other of said holes ; a first coupler for connecting said sealing member to the inner tank around the port; and a second coupler for connecting said sealing member to the outer containment vessel around the access opening and thereby fluidically isolating the containment area from the access opening.