These wastewater is stored and discharged to the outside of the boat through marinade sidecan suction until the wastewater in the toilet bowls, the water flowing from the lavatories or showers, or the dirty and oily water accumulating in the sinks is stored and returned to the marina to avoid damage to the boat and the environment. Polyethylene material is a type of storage suitable for use in this type of water due to its long life and robust construction, as it is not dumped from waste water or waste water. It can be used as a dirty water tank, a sink water tank, a shower water collecting tank, a deck going collecting tank.
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