If your boat requires additional ventilation, here is a simple way to make a ventilator that mounts on a hatch or cabin top. It provides good ventilation in rainy weather, yet keeps out rain and spray. For this project, you will require a piece of 4 inch diameter plastic pipe, approximately 7 to 8 inches in length. You also will need a small can of solvent cement for the type of plastic pipe you obtain. In addition, the project calls for two fittings: a coupling section for the pipe that is about 4 inches long, and an end cap. The only other items needed besides a few small screws is a plastic or aluminum kitchen bowl with a flat lip around its edge. The bowl should be about 6 inches in height. To make and install a rainproof ventilator, follow these steps.
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