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A vent apparatus is adapted to be coupled to a fuel tank and includes a valve housing made of a non-weldable plastics material and containing a valve. The vent apparatus further includes a tank mount made of a weldable plastics material and coupled to the valve housing. The tank mount is adapted to

A vent apparatus is adapted to be coupled to a fuel tank and includes a valve housing made of a non-weldable plastics material and containing a valve. The vent apparatus further includes a tank mount made of a weldable plastics material and coupled to the valve housing. The tank mount is adapted to be welded to an underlying fuel tank to support the valve housing within a mounting aperture formed in the fuel tank. The tank mount is coupled to the valve housing by a retainer ring formed to include an annular channel opening toward the valve housing. The valve housing includes an annular upper flange extending into an upper region of the annular channel formed in the retainer ring. The tank mount includes an annular lower flange extending into a lower region of that annular channel to mate with the overlying annular upper flange and trap a flange seal therebetween.

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1. A vent apparatus adapted to be coupled to a fuel tank, the apparatus comprisinga valve housing made of a non-weldable plastics material, the valve housing including a sleeve formed to include an interior region and a venting outlet arranged to conduct fuel vapor from the interior region of the sl

1. A vent apparatus adapted to be coupled to a fuel tank, the apparatus comprisinga valve housing made of a non-weldable plastics material, the valve housing including a sleeve formed to include an interior region and a venting outlet arranged to conduct fuel vapor from the interior region of the sleeve through a vent passageway to a destination outside the valve housing, the valve housing further including an upper flange positioned to lie outside of the interior region, a valve positioned to lie inside the interior region of the sleeve, the valve being arranged to move within the interior region to open and close a venting aperture interconnecting the interior region of the sleeve and the vent passageway of the venting outlet, a tank mount made of a weldable plastics material, the tank mount including a lower flange positioned to face toward the upper flange of the valve housing, the tank mount further including a base portion appended to the lower flange and adapted to be welded to an underlying fuel tank to support the valve housing within a mounting aperture formed in the fuel tank, a seal positioned to lie between the upper flange of the valve housing and the lower flange of the tank mount, and means for coupling the lower flange to the upper flange to trap the seal therebetween, the coupling means extending around the upper and lower flanges.