How does it work?


The vast majority of boats will pocket very small amounts of water at several different locations in the bilge. Bilge pumps are a cheap and effective way to quickly remove a large volume of bilge water. Whether it’s a rubber lobe, centrifugal, or diaphragm bilge pump, they all have a couple of things in common: they pump water, but they are not designed to move air with the water. Their efficiency drops dramatically once air touches the pump. The average pump will leave 1-2 inches of water behind when it cycles off, and this is perfectly normal. The general rule is that the larger the pump, the faster the flow, and the greater the amount of residual bilge water. The smaller the pump, the slower the flow, with generally less residual water. Bilge pumps are best described as a safety product because they are able to maintain vessel trim and flotation in the event that water suddenly floods into your bilges. Every boat needs at least one operational pump on board before leaving the dock.

The Arid Bilge System removes water much more slowly than a traditional bilge pump. It is designed and sized to capture all of the average daily bilge water that finds its way into the vessel.

Why: Instead of pumping the water, it uses a vacuum to suction bilge water, similar to the common wet vac. Arid Bilge vacuums residual bilge water with negative air pressure and continues to pull the water even as air starts to move through the intake tubes, down to the last drop, bringing the bilge water level down to a sheen that evaporates completely dry within 20 minutes.

The Arid Bilge pick-up sucker acts like a weighted filtered sponge, absorbing all of the remaining water down to nothing, directing it to the small capillary intake tubing for the trip to the central Arid Bilge unit where the thinking is done inside the box. Here, the traditional float switch has been replaced with a pair of vacuum switches. These “virtual float switches” never actually touch water, allowing the microprocessor to sense the resistance created by the water as it is pulled through the 20-foot minimum length of intake tubing. Once air is suctioned through the intake tubing, the resistance falls and the system will pause on that zone (or zones) for three hours before resuming.

If a larger volume of water suddenly enters the compartment within the rest cycle, the standard bilge pumps are there to prevent a more serious problem. The longevity of the Arid Bilge System, which uses mere milliamps, is enhanced by the fact that water never travels through the system’s vacuum pump and never comes in contact with the virtual float (vacuum) switches. This is the right tool for the job if you want 100% dusty dry bilges.