Abstract: A fuel tank component has a weldable connector that is connected to a housing via a micro-porous bonding film. The film creates a barrier to hydrocarbon permeation between two dissimilar plastics used to form the component.

Abstract: A fuel tank component has a weldable connector that is connected to a housing via a secure chemical bond. The connector and the housing are modified so that they bond to each other. The interface between the connector and the housing may be stepped to increase its surface area and thereby increase the strength of the chemical bond. The chemical bond in the inventive valve eliminates the need to include complex interlocking geometries in either the connector or the housing and reduces the complexity of the tooling needed to mold the component.

Abstract: A pass-through formed of material unweldable to a non-metallic tank has an adaptor ring formed of material also unweldable to the tank which is welded to the pass-through body. Prior to welding the adaptor ring to the pass-through the adaptor ring is chemically bonded to a mounting ring, which is formed of material weldable to the tank. The assembly thus formed may then be welded to the tank.