Patent ID: 6962269

Claim:
A fueling environment, comprising: a plurality of fuel dispensers; a double walled piping system adapted to connect fluidly said plurality of fuel dispensers in a daisy chained arrangement such that fuel is delivered to each of the fuel dispensers from an underground storage tank by an inner conduit and leaks within the double walled piping system are returned to the underground storage tank by an outer conduit; and at least one leak monitor associated with at least one of said plurality of fuel dispensers, said at least one leak monitor positioned in said outer conduit; said leaks within the double walled piping system are returned to the underground storage tank with vacuum assistance, wherein at least one of the plurality of fuel dispensers comprises: fuel handling components; a housing delimiting: a fuel inlet aperture receiving an incoming portion of the double walled piping system; and a fuel outlet aperture adapted to allow an outgoing portion of the double walled piping system so that fuel is passed to a downstream fuel dispenser within the plurality of fuel dispensers; and a manifold, wherein said double walled piping system includes a t-intersection positioned within said manifold such that fuel is distributed to said fuel handling components, wherein said outer conduit is positioned at least partially within said manifold and extends from said fuel inlet aperture to said fuel outlet aperture without being terminated inside the manifold or at the fuel inlet aperture or at the fuel outlet aperture and substantially prevents fluid passage from said outer conduit to said manifold.