Fume Extraction 


The stack mount uses original ‘360 Siphon®’ patented technology to create a continuous updraft from the source to the top of the vent pipe. (See video below)

360 Siphons in 2" 3" and 4" sizes

*Also available in black


  • Eliminates back pressure by instilling a low pressure draw from the tank to the exhaust port of the siphon cap. Outside wind variations simply no longer matter and the rougher the condition, the better the draw.
  • Protects the stack pipe from debris, pests (built in bug screen), and excessive water entry.
  • Provides superior oxygenation to stop the buildup of Hydrogen Sulfide (the rotten egg smell).

Wind Direction and Speed – The Culprit of Odor-Causing Tank Emissions

It only takes slight down drafts of 11 degrees to blow down into an open stack. Sudden wind gusts and directional shifts will cause continued high and low pressure in the system. Too many extreme changes can eventually dry out water traps. In a windy area or in a system with slightly compromised plumbing, the 360 Siphon® will tame the turbulent wind, eliminate the culprit of back pressure, and instill a low pressure (vacuum) within the system.

Stack Mount Installation

Installation is designed to be simple and easily accomplished by anyone. It normally requires less than a minute, and pipe sizes exceeding 2″ use no screws or glues to keep in place. They are easily removed to check pipes. (Note: 2″ OD ABS black and 2″ white PVC pipe requires only two self-drilling retainer screws which we provide).

Pipe Sizes

  • 2″ Pipe – Simply place the cap on the end of the 2″ pipe, and install the 2 self-drilling screws provided in the pre-drilled holes. Do not over tighten.
  • 3 & 4″ Pipe – Mounts directly onto pipe with no screws or glue required for a snug fit
  • That’s it!

Watch the Multi-Patented 360 Products Technology Work!

It draws fumes under any wind conditions, regardless of severity.

360 Technology In Use


Pub using the 360 Siphon® technology with positive comments of success


Gen 2 Rooftop Septic Stack Mount Vent


Residential house using the 360 siphon® with positive comments on the success of the product


Hood River High School with comments about the successful removal of stench from the boys bathroom

Jefferson Institute

The 360 Siphon® on top of a vent for a research facility with comments on the success of the device in reducing the oxygen level to basically 0%


Target logo
360 Products Stack Mount technology was incorporated in parking lot lighting structures that satisfied a code requirement where methane gas had to be properly mitigated from land below before building approval was granted.



“A few years ago, we added an addition to our 2nd floor, extending the 1.25” septic vent stack approximately 6’ to the new roofline. Since then, we had noticed that on windy days, septic gas stench would backdraft down the pipe into our bathrooms and laundry room. After numerous failed attempts to remedy, including a plumber’s visit, we were ready to rip out existing plumbing and replace with an expensive, new redesign. Fortunately, a quick online searched found the 360 Siphon Stack Mount Vent Cap, and after a quick install, our backdraft problem has been eliminated! I can’t express our gratitude enough for such a simple and inexpensive solution! Company communication and delivery assistance was also 2nd to none-we highly recommend!


Greg S.

Norwich, CT


May 10, 2019

“Tried this to avoid tearing out a wall to repair a probable cracked vent stack in my house. No sewer septic gas smell outside anymore! Also tried on my mom’s house too, which has random wind patterns that affected updraft, causing odor in the house. Instantly solved. She is a stickler for design and has not even noticed they are there. Awesome product!”

Diana S.



The U.S. Department of Energy’s Thomas Jefferson National Accelerator Facility in Newport News, Virginia, is al electron accelerator basic-physics research facility. The device that captures the residual energy of the beam after use is housed in a nitrogen-blanketed, five thousand cubic foot enclosure. The original vent allowed air to back-draft, increasing the O2 concentration above acceptable levels. A few weeks ago the lab installed a 360 Siphon. The following is a recent comment by a senior engineer.

“Gents, Last week, after the electricians sealed up the electric box on the N2 pump and facilities installed the new vent cap on the stack, I made a couple measurements at the dump vent stack for flow and O2.

The flow was significantly higher than it had been in the past (there was a mild breeze blowing, and the effect of the gusts of wind could clearly be seen, drawing the gas out of the stack). The manufacturuer of the cap says that even a 1 mph wind will establish a positive draft on the stack.

The O2 level is at the lower limit of what the meter could read (essentially 0% oxygen). This is a great improvement, and indicates that we are getting an effective purge (better than the design goal). I want to confirm this with a measuremenet from inside the hall.

Thanks to everyone for your support.”


Newport News, VA

Contact Us

Veteran Owned & Operated



9:00am-9:00pm EST

Distribution points

Linton, Indiana

Vancouver, BC




P.O. Box 450
Linton, IN 47441


A portion of your order total will be donated to charity and does not increase your product cost. This year's charities are: Saint Jude's Children's Hospital, Make-A-Wish Foundation, Salvation Army, Wounded Warriors project, and The Gary Sinese foundation (Veterans).