Camco 40033 RV Plumbing Vent Kit, Polar White

The plumbing vent on your RV roof does a quiet but important job, and most owners never think about it until it fails. It lets the black and gray holding tanks breathe. That's what keeps waste draining cleanly instead of glugging, and it sends odor up and out above the roof instead of letting it creep back into the living space. The cap on top keeps rain and road debris from dropping down the pipe while still letting air move. When that vent gets brittle and cracks, or the cap snaps off on a low branch, you start to notice slow drains and smells that shouldn't be there. The Camco 40033 is the factory-style replacement that sets it right.

One kit covers a wide range of rigs. It fits any plumbing vent pipe with an outside diameter between 1 inch and 2-3/8 inch, which is the size you'll find on the vast majority of travel trailers, fifth wheels, and motorhomes. Before you climb up top, measure the outside diameter of the exposed pipe with a tape or a caliper. If it lands anywhere inside that range, this kit drops right on. No shims, no guesswork.

This is a complete kit, not just a bare cap. You get the vent body, the cap, the mounting hardware, and a roll of putty tape to seal the base against the roof. Because it's an OEM-style replacement, it matches the original factory footprint, so you're working with the same screw pattern instead of fighting a universal part that almost fits. The Polar White finish keeps it looking clean against a white or light-colored roof, so the repair doesn't stand out from ten feet away. That matters more than you'd think when the whole point is to make the fix disappear.

The swap itself is a job most owners can knock out in under an hour with basic hand tools. Pull the old vent, then scrape the old sealant off the roof down to a clean, dry surface. That step matters more than people expect, because fresh sealant won't grab over old, chalky residue. Dry-fit the new vent to check the screw pattern lines up, lay the putty tape around the base, set the vent down, and drive the hardware. A lot of folks also run a bead of self-leveling lap sealant over the flange afterward for extra insurance against water intrusion. That's your call, and it isn't included in the kit. Either way, give the repair a good look after the first hard rain to make sure it's staying dry underneath.

If your rig is more than a few seasons old and it lives outside, the plumbing vent is one of those parts that quietly degrades in the sun. The plastic goes brittle, a cap goes missing, and a hairline crack you never spotted starts letting water and smell through. This is a cheap, quick fix that heads off a much bigger and messier problem down the road. It's also the kind of part worth keeping in the spares bin if you travel a lot, because a cracked vent three states from home is a lot easier to handle when the replacement is already sitting in your storage bay.

Camco has been making RV and outdoor gear since 1966, and simple, honest parts like this are their bread and butter. There's nothing exotic here. It's a well-made replacement that does exactly what the original did, at a price that makes swapping a tired vent a no-brainer rather than a project you keep putting off. Order one, pick a dry afternoon, spend an hour on the roof, and cross it off the list.