Kristian Ferrell
When a boat sinks, the water that enters it can drain out through various outlets. This includes the sink, shower, and washbasin, which all route back to the bilge where the bilge pumps pick up the water and toss it overboard. The shower drain in the floor and the sink drain in the galley are two examples of how water can enter the bilge. The water can then be drained out through a black outlet on the side of the boat or a white outlet under the seat on the starboard side.
| Characteristics | Values |
|---|---|
| Where does the water go? | Drains out through a black outlet on the side of the boat, into a hose that drains out the back of the transom |
| How does it drain? | Through a bilge pump |
| What about the shower? | The shower drain routes water back into the bilge, where the bilge pump picks it up and tosses it overboard |
| What about the sink? | The sink drain goes directly to a thru hull below the waterline |
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What You'll Learn
- Water that enters a boat when it rains can drain through an outlet under a seat
- Water from the shower and washbasin is routed to the bilge, where it is picked up by the bilge pump and tossed overboard
- Water from the sink can go directly into a thru-hull below the waterline, meaning the sink never actually drains
- Water from the sink can be drained into a small holding tank with a float-triggered bilge pump
- Water from the boat can be drained out through a black outlet on the side of the boat
Water that enters a boat when it rains can drain through an outlet under a seat
The water that drains from the sink in the galley of a boat usually goes directly to a thru-hull below the waterline. However, some boats may have a small holding tank with a float-triggered bilge pump to collect the water from the sink. The shower drain in the floor routes water back into the bilge, where the bilge pumps pick it up and toss it overboard.
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Water from the shower and washbasin is routed to the bilge, where it is picked up by the bilge pump and tossed overboard
In some boats, the shower and washbasin drains are connected directly to the bilge pump, allowing water to be pumped out of the boat immediately. In other cases, the drains may lead to a holding tank, which is then pumped out by the bilge pump at regular intervals or when it reaches a certain level. This helps to manage the flow of water and prevent the bilge pump from becoming overwhelmed.
The specific configuration of a boat's plumbing system can vary depending on the type and size of the boat, as well as the preferences of the owner or manufacturer. Some boats may have additional pumps or holding tanks to manage water from different sources, such as the sink or shower. It is important to ensure that the plumbing system is properly maintained and that the bilge pump is functioning correctly to prevent water accumulation and potential flooding.
Additionally, it is worth noting that the use of special biodegradable soaps is recommended when showering or washing up on a boat. These soaps are designed to be environmentally friendly and typically do not contain phosphates, which can be harmful to aquatic ecosystems. By using these soaps, boaters can help minimise their impact on the surrounding water and marine life.
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Water from the sink can go directly into a thru-hull below the waterline, meaning the sink never actually drains
The bilge pump is an important component of a boat's plumbing system, as it helps to remove water that has accumulated in the bilge, which is the lowest compartment of the boat. This water can come from a variety of sources, including leaks, rain, or waves splashing over the side of the boat. The bilge pump is typically located in the lowest part of the bilge, where it can effectively remove the water.
In some cases, the sink water may drain directly overboard through a hose. This is typically done through a black outlet located on the side of the boat, near the jet pump. There may also be a check valve in place to keep the water out while the boat is stationary.
It is important to note that the holding tank from the toilet is separate from the rest of the plumbing system. For health reasons, it is illegal to dump black water overboard. Instead, the contents of the holding tank must be disposed of at a designated dump station.
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Water from the sink can be drained into a small holding tank with a float-triggered bilge pump
The holding tank from the toilet is also separate from everything else. For health reasons, it is illegal to dump black water overboard. When on the water, you cannot simply pull up to a dump station and use gravity to dump contents via a hose into a land-based holding tank.
Some boats have a thru-hull below the waterline, which the sink drain connects to. This means the sink never actually drains.
When a boat is out on a trailer, water inside the boat can drain out through a black outlet on the side, which then goes into a hose that drains out the back of the transom.
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Water from the boat can be drained out through a black outlet on the side of the boat
The shower drain in the floor routes the water back into the bilge, where the bilge pumps pick it up and toss it overboard. The washbasin also routes back to the bilge. It is important to note that the holding tank from the toilet is separate from everything else. For health reasons, it is illegal to dump black water overboard.
On some boats, there is a thru-hull below the waterline that the sink drain connects to. This means that the sink never actually drains. However, some people choose to drain the sink into a small holding tank with a float-triggered bilge pump or directly into the bilge.
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Frequently asked questions
The water drains through an outlet under the seat on the starboard side. It is then assumed to be drained out using the bilge pump.
The shower drain in the floor routes the water back into the bilge where the bilge pumps pick it up and toss it overboard.
The sink drain goes through a thru-hull below the waterline. The water is then drained out through a black outlet on the side of the boat.
The holding tank from the toilet is separate from everything else. For health reasons, it is illegal to dump black water overboard.
