Rv Plumbing Sewer Vent, Xtreme Vent, WhiteEliminate RV holding tank odors permanently while traveling down the road or parked!  Just remove the vent cap and screw onto the exposed pipe. The Xtreme RV Plumbing Vent is designed with a true Venturi. The vent swivels with the wind so the larger opening always faces the direction of air movement, whether driving down the road or parked. The air enters the vent through a larger opening and is then compressed as it is forced through a smaller opening, causing the air to speed up as it exits out the opposite side. This principle is the Venturi effect and it causes a low pressure area sucking the odors out of the holding tank. The constant flow of air through your holding tanks creates an oxygen rich environment in your tanks to promote the natural enzymes in the waste in your grey and black holding tanks, and enzymes cause the natural decomposition of the solids. Odors from the grey tank can also be onerous, so get one for that tank too if there is a separate vent pipe.HOW DOES IT WORK? XTREME VENT® is designed to use the Venturi Principal. It easily rotates so that the larger opening always faces the direction of air movement. The air enters the vent and is compressed causing the air to speed up as it exits out the opposite side creating a Venturi effect.What is the Venturi Effect?The Venturi effect is fairly common, notice how a garden hose nozzle increases the water pressure. The fuel injectors on diesel engines use it as well. The Venturi effect can cause a pressure differential, essentially an air stream which will sucking the odors out of the holding tank. As the holding tank equalizes fresh air is drawn in.Rv Plumbing Sewer Vent, Xtreme Vent, White