
Plumbing on a boat is a lot easier to do yourself than plumbing at home, as it doesn't involve rigid pipes running inside solid walls. Boats have a freshwater storage tank filled with potable water, which is used for the shower and the sink. Both use a pump to draw from this tank as their source. The toilet on a boat is either a chemical toilet or uses a device called a seacock to get water from outside. All the piping for the water system on a boat must be non-toxic and non-contaminating.
| Characteristics | Values |
|---|---|
| Water source | Freshwater storage tank filled with potable water |
| Water storage | Tank filled with potable water |
| Water discharge | Safely discharge water used on the boat |
| Piping material | Non-toxic, non-contaminating, traditionally clear PVC reinforced with polyester braid, recently semi-rigid polyethylene (PE) tubing |
| Pump | Cycles on and off until the tap is closed, connects directly to the tank outlet or multitank valve |
| Toilet water source | Chemical toilet or seacock to draw water from outside |
| Rigidity | More flexible than home plumbing, no rigid pipes running inside solid walls |
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What You'll Learn

How does water get in?
Boats have a freshwater storage tank filled with potable water. The shower and the sink need fresh water, and both use a pump to draw from this tank as their source. The inlet of an electric pump connects directly to the tank outlet (or multitank valve), and the outlet supplies water to all faucets and appliances. The pump cycles on and off until the tap is closed.
The toilet on a boat is either a chemical toilet or uses a device called a seacock to get water from outside. This is a valve that draws water in from wherever you are floating with the use of a pump.
All the piping for the water system on your boat must be non-toxic and non-contaminating. Traditionally, clear PVC reinforced with polyester braid has been used for this. Recently, however, semi-rigid polyethylene (PE) tubing has become a popular choice. This is often used in RVs, and can be combined with quick-connect fittings for easy assembly. PE tubing comes standard in opaque white, but you can also get it in different colours like blue or red, which may come in handy down the road for identifying water lines. PE is less flexible than PVC and must be cut to specific lengths, but the tubing is cheaper than PVC.
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How does water get out?
Plumbing on a boat works differently from plumbing on solid ground. Boats have a freshwater storage tank filled with potable water, which is used for sinks and showers. The water is drawn from this tank using a pump.
Toilets on boats do not need to be filled with drinking water, so they either use a chemical toilet or a device called a seacock to get water from outside the boat. Seacocks are valves that draw water in from outside the boat with the use of a pump.
All the piping for the water system on a boat must be non-toxic and non-contaminating. Traditionally, clear PVC reinforced with polyester braid has been used for this. More recently, semi-rigid polyethylene (PE) tubing has become a popular choice. This is often used in RVs and can be combined with quick-connect fittings for easy assembly.
The pump cycles on and off until the tap is closed. The inlet of an electric pump connects directly to the tank outlet (or multitank valve), and the outlet supplies water to all faucets and appliances.
Water gets out of the boat through a plumbing system that safely discharges the water used on the boat.
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$24.3

What are boat toilets like?
Boat toilets are usually either chemical toilets or use a device called a seacock to get water from outside the boat. A seacock is a valve that draws water in from outside the boat with the use of a pump. The water used on a boat needs to be safely discharged, and boats have a freshwater storage tank filled with potable water. The shower and the sink use a pump to draw from this tank as their source. All the piping for the water system on a boat must be non-toxic and non-contaminating. Traditionally, clear PVC reinforced with polyester braid has been used for this, but recently semi-rigid polyethylene (PE) tubing has become a popular choice. This is often used in RVs and can be combined with quick-connect fittings for easy assembly. PE tubing comes standard in opaque white, but you can also get it in different colours, which may be useful for identifying water lines. PE is less flexible than PVC and must be cut to specific lengths, but the tubing is cheaper. The pump cycles on and off until the tap is closed. The inlet of an electric pump connects directly to the tank outlet (or multitank valve), and the outlet supplies water to all faucets and appliances.
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What materials are used for boat plumbing?
Plumbing on a boat is a lot easier to do yourself than plumbing at home, as it doesn't involve rigid pipes running inside solid walls. Boats have a freshwater storage tank filled with potable water, which is used for sinks and showers. The toilet on a boat is either a chemical toilet or uses a seacock to get water from outside.
All the piping for the water system on a boat must be non-toxic and non-contaminating. Traditionally, clear PVC reinforced with polyester braid has been used for this. However, semi-rigid polyethylene (PE) tubing has become a popular choice. This is often used in RVs, and can be combined with quick-connect fittings for easy assembly. PE tubing comes standard in opaque white, but you can also get it in different colours like blue or red, which may come in handy for identifying water lines. PE is less flexible than PVC and must be cut to specific lengths, but the tubing is cheaper.
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How does boat plumbing differ from home plumbing?
Plumbing on a boat differs from home plumbing in several ways. Firstly, boats are not on solid ground, so there needs to be a plumbing system to safely discharge the water used on the boat. Secondly, boats need to have storage for the water they use. Boats have a freshwater storage tank filled with potable water, which is used for the shower and the sink. Both of these use a pump to draw from the tank as their source. The toilet on a boat is either a chemical toilet or uses a device called a seacock to get water from outside the boat.
Another difference is that the piping for the water system on a boat must be non-toxic and non-contaminating. Traditionally, clear PVC reinforced with polyester braid has been used for this, but recently, semi-rigid polyethylene (PE) tubing has become a popular choice. This is often used in RVs and can be combined with quick-connect fittings for easy assembly.
Boat plumbing is also easier for the DIY enthusiast than home plumbing, as it does not involve rigid pipes running inside solid walls. The pump cycles on and off until the tap is closed, and the inlet of an electric pump connects directly to the tank outlet or multitank valve. The outlet then supplies water to all faucets and appliances.
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Frequently asked questions
Boats have a freshwater storage tank filled with potable water. The shower and the sink use a pump to draw from this tank as their source.
Traditionally, clear PVC reinforced with polyester braid has been used for boat plumbing. More recently, semi-rigid polyethylene (PE) tubing has become a popular choice.
The toilet on a boat is either a chemical toilet or it uses a device called a seacock to get water from outside. This is a valve that draws water in from wherever you are floating with the use of a pump.
The inlet of an electric pump connects directly to the tank outlet (or multitank valve), and the outlet supplies water to all faucets and appliances. The pump cycles on and off until the tap is closed.











































