I replaced my 1999 XK8 vacuum purge valve (original part number LJB1515AA) with LJB1515BB which supersedes the original LJB1515AA unit. I find that the superseded part has what appears to be a vent that is not part of the original unit. I've attached pics of each. My question is, does this vent to the atmosphere? I've seen these vents before on my XJS, and it vents to the atmosphere through what looks like a fuel filter.

This is the LJB1515AA original unit.

This is the new unit. The arrow points toward what appears to be a vent.