360 Siphon RV Fume Extractor - White

This thing actually works as advertised. Who'd a thunk it? I was a little nervous about cutting the existing vent pipe off 1/2" above the roof, but, by laying a 1/2" block of plywood next to the pipe and using that to guide a reciprocating saw -- I was able to get a square cut. I would not attempt this just by marking the pipe with a sharpie or something similar. The way this device is designed, the cut has to be pretty accurate to work properly. The hardest part was removing the old one. I used a Multi-tool because a simple putty knife was not up to the job. The original vent was installed w metal screws. Using the multi-tool with a metal cutting blade took care of the screws, but melted the sealant, and made quite a mess. This was a bigger job than indicated in a promotional video. Be prepared to throw away the blade after cutting through the screws and the original sealant unless you want to spend a lot of the remaining days of your life cleaning a $6 blade. The included "sealant tape" did not work well for me -- so I used a tubed silicone sealant instead -- put a layer on the roof, used new screws to secure the device to the roof, and, then covered the entire flange, screws and all, with another layer of sealant. It is worthy to note that I keep my Coach in a fully enclosed metal storage bay, and, previous to the installation of this device -- after being away for a few days, I was bothered by sewage odor. Amazingly, this device works well even when the Coach is stored in this bay where the ambient air is very still. My Coach Exhibited three identical Vent caps. I gained confidence in the process after replacing the first one so proceeded to the second one which turned out to be a cover for some 12v wiring. Bummer -- the same mess and ruined blade! Replaced that one w acheaper cap. The third one went smoothly following the then proven procedures, and, the results are truly amazing, and, worth the effort.

When driving our motorhome, the sewer smell would get so bad inside that it almost made us sick. I installed the 360 Siphon on both vents. Our next trip was 1000 miles over four days. We had no obnoxious smells whatsoever! The installation would have been easy if I had 1-1/2" vent pipes, but mine were 1-1/4". So, I had to go to the hardware store and find an adapter and then cut it down to 1/2" long to fit the 360 Siphon onto my vent pipes. This made the installation much more difficult. The instructions with the 360 Siphon cover this situation, however they do not include the small adapter in the kit for the 1-1/4" vent pipes. The cost to include an adapter for the 1-1/4" vent pipes must be pennies, so I don't understand why 360 Products does not include it.At the same time, I also replaced my toilet and the two sink vent valves (air admittance devices) located under each sink just to make sure this problem was solved.

This vent is fairly easy for a couple of novices to install although we were not 100% sure where the putty was supposed to go. The install was made even easier because the existing vent stack we have was short enough already that we didn't have to shorten it down to place the insert in it.The insert was a snug fit and the whole assembly seems to be working well. It didn't require the same number of screws as the original vent cover. We also used some self leveling Dicor over the old screw holes and sealed around the whole base of the unit as well. We test drove with stuff in the tanks and where before we'd get gassed out is now a pleasant ride.

I purchased the 360 Siphon RV Fume Extractor from Amazon last year to replace original equipment on my Essex Coach. Prior to buying I reviewed the product on 360 Product's Web Site and watched the Video. The engineering seemed sound and the product reviews that I found around the web were mostly positive. The installation was easy and the product looked great on my coach's roof. I have a large garage where the coach is parked through the winter months, so I was not able to test the 360 Siphon out until the spring of this year (2015). I left in April on a cross country trip to California. While driving through New Mexico I began to notice unpleasant odors emanating from the restroom when the Coach was in motion and the commode was flushed. By the time I reached Arizona the odors were bad any time the commode was flushed, whether in motion or not. Because of time considerations I elected not to make any changes to the black tank until the return trip home and employed the restroom vent fan whenever the commode was used. Nevertheless the orders continued to intensify on the return trip. Upon reaching Texas, I contracted with a nationally known RV tank cleaning company to have both the black and grey tanks thoroughly cleaned. This seemed to help a little, but once the black tank began to fill the odors returned.I don't know the real reason why the product did not work as advertised. One might attribute the product's poor performance to the dusty environments of West Texas, New Mexico and Arizona and it simply clogged up. If the vent stops up obviously its a product defect and the manufacturer should inform the buyer not to use in dusty environments.

Update, 10 months later no inside odors (tank related) while driving or parked. Upgraded to 5starSept 2014I occasionally have complaints of sewer odor while driving the motorhome. Heck, I've smelled it a few times and my nose isn't bionic like hers. Will update this if it isn't effective but for now 4 stars because the tape included is not wide enough to cover the flat spots on the bottom and the lack of screws. Directions say to reuse existing screws which is fine if they are pan head and in good condition. Tapered seat screws may split the vent cap base if you aren't careful. Some have complained that the lid prevents holding your driver vertical but the area around the screw holes are angled for that reason. Use the flat area around the screw holes as a guide for installation.