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The Lippert 360 Siphon RV Vent Cap pulls odors and gases out of the black water holding tank before they can leak into your living space. Its patented siphoning design uses outside air to form a natural upward vacuum in the vent pipe, so it works immediately in any wind condition. The result is cleaner air inside and better waste breakdown in the tank without masking smells with chemicals or perfumes.
Once installed, this vent cap needs no upkeep. The design has no moving parts to wear out or jam, so it keeps working every time air moves across the roof. The integrated bug screen keeps out insects and debris, and the UV-resistant polycarbonate build stands up to sun and weather over time.
The universal fit makes this vent cap easy to use on most setups. It includes a funnel for 1-1/2" pipe stacks, and you can add a PVC adapter sleeve (not included) for 1-1/4" or 2" stacks. The base measures 4-1/2" in diameter and 3" tall, with mounting hole spacing of 2-7/16" side-by-side and 3-7/16" across.
You can install it two ways depending on your current vent condition. If your existing base and sealant are in good shape, a modified install replaces just the lid using the included collar and sealant (sold separately). If the old cap is damaged or poorly sealed, a complete install swaps the entire unit, base and all, for a brand-new, watertight fit.
Made of strong white polycarbonate that’s RVIA 1192 compliant, this vent cap is built to handle vibration, weather, and UV exposure. Once sealed and mounted, it stays put and keeps working quietly in the background—no maintenance, no hassle, just steady odor control where it matters most.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today, we're gonna take a look Lippert Component's 360 siphoning RV holding tank vent cap. This comes in white. Basically, this is gonna help to eliminate any nasty odors that occur in your RV from that black water tank. A lot of times they can be a build up of gases inside that black water tank that come out of your commode, so this is going to help to siphon those out.Basically, it's going to create a vacuum to pull those gases up and out, and eliminate any of that backtracking gas. It's also gonna create a more oxygen rich environment inside your tank, which is going to help to make that waste break down faster, and that's also gonna have an added benefit of eliminating the need for as many chemicals inside your tank to do that job.It's gonna be a pretty easy install, no moving parts in this setup. It's going to pretty much be effective immediately as soon as you install it.
Just needs a little wind to blow through there through the top of your vent.We are going to have our funnel there to fit into an inch and a half pipe, which is a pretty typical size for your RV roof vent. If you have a two inch pipe you wouldn't need to use this component. The pipe will just fit in there directly.We also have a small adapter ring if you're using this on a taller pipe, or a different setup. There's a complete list of instructions on how to get this installed if you're just updating your old cap, or if you're putting it in a new system, or maybe replacing a damaged, or improperly installed cap.There's also a pretty good diagram there showing just how the 360 Siphon works. This is made of a strong polycarbonate construction.
It's also going to have a built in bug screen, as you can see there, to keep out any unwanted pests from getting into your tank and causing problems there.There's no maintenance required with this, and again, it does come in white. There's also a black version available. That part number is available here at etrailer.com, and it's going to be L-C-3-8-9-3-8-0.That's gonna do it for our look at the Lippert Component's 360 Siphon RV holding tank vent cap in white.
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James
3/31/2025
So far, great! Traveled to both coasts and back, held up well and does its job.