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Installing A Campervan Water System [Sink & Plumbing Diagrams]

A constant supply of water is probably the most important thing you are going to need in your campervan. Because you need to access this water multiple times a day it’s essential to find a system that works for you. Some van lifers (like us) simply store water in containers and pour it into a bottle when needed. Others develop entire systems with heated water and showers!

This article is a overview of common methods to carry water to help you decide which system you will want to use.

storing water in a campervan conversion

Personally, we store water in four 3.5-gallon water bricks

Things to consider when storing water

Size of the tank

Water storage is the one of the universal necessities for vanlife.  So it’s important to get it right. At a minimum, you should be packing at least one gallon of water per person per day. That is not taking into account cooking, cleaning and any pets you’re bringing along. Storing water can be as simple as packing a few inexpensive plastic jugs. 7-gallon Aqua-Trainer containers and 5-gallon Hedpack water tanks are two of the most popular types.

Weight of the tank and ease of access

You also need to consider whether you are physically able to move or fill the water containers. It makes no sense to pack a 5-gallon tank of water if you’re unable to lift nearly 50lbs.

1 gallon of water weighs a touch over 8 lbs. (3.78kg)

If you will be moving water containers in and out of your vehicle, we recommend choosing a tank that is 5-gallons or smaller. If you have larger containers, it makes sense to store them in a way that they will be easily accessible from  a hose. Place your water container near a door or entry point. Look for tanks that have handles so they can be easily moved. Filling a large container can be made easier with the help of a food-safe hose and connector. These connectors are made of rubber and designed to fit snugly on campground spigots.

storing water in a food safe steel tank

Health of the container

Not all freshwater tanks are created equal. Read the specs on your tank carefully and choose one that uses an FDA-approved material. The same is true for any tubing or plumbing you plan to add. Not all tubing is food-safe.

Some people choose not to store their water in plastic containers at all. In those cases, stainless steel water tanks are available.

Where to refill water

Luckily, clean water is relatively easy to find. The smaller your water container, the easier it will be to refill at grocery or hardware stores. For larger containers, many National Parks or State Forests will have visitor centers with water spigots.

Campgrounds are an easy place to find water, and sometimes city visitor centers will have water spigots available as well. When it comes to paid options, most Walmarts have water refill stations inside (near the ice up front) that can be used for $0.37 per gallon.

Filtering and Treating Water

If you choose to do a lot of boondocking or camp too far off-grid, it’s a good idea to carry an emergency water filter. Sawyer mini water filter and MSR MiniWorks are two choices that will allow you to filter water from any lake or stream and use it as drinking water.

You can also buy iodine tablets to sanitize questionable water or boil it for seven minutes to kill unwanted organisms.

What Is A Gray Water Tank?

A gray water tank stores any unused or waste water that comes from your fresh water tank. If you decide to build a campervan sink (or shower), a waste water tank will be necessary. These are most often stored underneath a sink but may also be stored beneath the vehicle. Gray water tanks do not have to be FDA-approved because you will not be drinking out of them.

We do not recommend draining gray water directly onto the ground from the van, however some people do choose to have plumbing running off of their gray water tank to the outside of their vehicle with a release valve for when you’re in an area that it’s appropriate to do so.

Use biodegradable soap when washing items in a van, especially if you’re dumping anything outside! And do not dump water in or near stream as all soaps are bad for aquatic life (even the biodegradable ones).

Installing a sink in your DIY campervan

If you have the space, installing a sink in your DIY campervan build is a good way to add a little extra comfort to van life. There are four main ways of getting water out of your container and into a cup or sink:

  • Gravity-fed water system
  • Manual hand pump
  • Manual Foot pump
  • Electric pump

Gravity-fed water

Using the gravity-fed water system is the simplest and cheapest way to access water. There are little to no parts involved so you can count on it working every single time. We recommend finding a spigot that fits the top of your water container. Placing your container at a higher point than your sink or water bottle is all that it takes. Some people have even built showers out of the gravity-fed water system.

Keep in mind, water containers are heavy. Make sure your jugs are securely fastened so they don’t move around while driving.

Manual hand pump

A hand pump is another simple and inexpensive way to receive water. All it takes is a pump faucet and some flexible tubing. Pressure from the pumping mechanism will draw water up the tube and out of the faucet.

One of the more popular brands of hand pumps is the flipper pump by Whale Water Systems. Manual hand pumps take up a little less space than foot pumps and there is significantly less tubing required. They are also quite! As a downside, you will get little control over this water and the pressure is not always the strongest.

The dolphin hand pump is a low-budget hand pump that comes with its own tubing built-in. This item will fit on any standard 5-gallon tank and works just like a soap dispenser. For a few dollars at Walmart, you can purchase a standard 5-gallon jug and fit this device on top.

Water containers like this one can be refilled or swapped out at any Walmart or grocery store for a small fee.

Manual foot pump water system

Foot pump sinks involve a similar setup to the hand pump. They require only a few parts and if you purchase camper-specific pieces everything should fit together nicely. Foot pumps are easy to install and also very quite unlike an electric pump. The difference between a hand pump and a foot pump is you will get a little bit more control over the water flow as well as hands-free operation.

Manual Foot Pump Sink Parts
5-gallon Fresh Water + Gray Water Tank
Spout Faucet
Sink
Strainer Drain
Drain Tap with Hose
Foot Pump
Food Safe Tubing
Hose Clamps

 

how to install a manual foot pump sink

Manual Foot Pump Parts And Installation

Fresh and Gray Water Tanks
Fresh and gray water tanks should be securely fastened so they don’t slide around or spill while you’re driving. We recommending using straps to tie them down so they can be easily removed.

Spout Faucet
A spout faucet should come with a single water tap since there is no water heater built into this system. The spout faucet should be connected directly to the foot pump using .5″ tubing.

Sink
A steel sink can be purchased ready made, or you can build a DIY sink with an inexpensive steel mixing bowl. Most sinks come with a 2-2.5″ hole drilled in the bottom which will fit a standard strainer drain.

Strainer Drain
A 2-2.5″ strainer drain is mounted directly into the sink or bowl. Choose one with a strainer that can be closed to prevent any backsplash with frequent movements while driving.

Drain Tap with Hose
A drain tap acts like a mini-version of the U-pipe underneath your home sink. In a home, the U-shape creates a seal to prevent sewer gas from passing through the drain pipes. In a van, the miniature trap will prevent smells by allowing a small pool of water to form in the bottom.

The Camco camper drain tap will screw directly into a 2″ strainer drain and has a hose readily attached that can connect to your gray water tank.

Foot Pump
A manual foot pump should be mounted to the wall or floor and comes with a pedal and two connection points for food safe tubing. The first tube will lead directly to the faucet, and the second tube will lead into the fresh water tank. The Gusher Galley foot pump is one of the most popular pumps on the market. It’s two connection points fit .5″ flexible tubing. This foot pump can release 4.3-gallons of water per minute.

When purchasing a foot pump, keep in mind they come with either left-hand or right-hand levers. The difference is the position of the inlets and outlets for mounting.

Food Safe Tubing
Food-safe tubing will run from the pump into the fresh water tank and faucets. You will want to purchase .5″ flexible tubing. The tubing can be slipped directly onto the foot pump and faucet and secured with hose clamps.

12 Volt Electric Sink Pump

Building a 12-volt electric sink into your campervan is a great way to have a consistent supply of running water. This type of sink will make you feel the most at home and can also be hooked up to a hot water heater to make larger installations like showers.

Although an electric sink is not the simplest to install, it still only involves a few parts and requires just a small amount of electricity. The advantages of an electric sink include high and consistent water pressure as well as easy operation. As a con, an electric sink pump can be quite loud on its own. We recommend installing an accumulator (explained below) to save on noise and electricity.

Parts of a 12 Volt Electric Sink
20-gallon Fresh Water + Gray Water Tank
Sink with Faucet
Strainer Drain
Drain Tap with Hose
Water Pump
Accumulator
Food Safe Tubing
Switch
Hose Clamps

how to install a 12 volt electric sink

12V Electric Sink Installation

Water Tanks
A key part of any water system are the water tanks. You will want to secure your tanks under the sink or in a safe spot where they cannot move around while driving. The fresh water tank should have two openings, one for the air valve, and one for the tubing to supply the sink. An optional fill hole can be added as well.

The gray water tank will only need one opening for the waste water tubing.

Sink with Faucet
Depending on which type of faucet you choose to purchase, there will either be one water tap or two. Regular household faucets come with a tap for hot water and a tap for cold. In the example installation above, we are not including a hot water heater so only one tap will be necessary. Plug off the hot water tap with a plug that fits your diameter tube.

Fun tip: you can install an pull-out sprayer faucet near a door or window to double as a portable shower!

Strainer Drain
You can choose to purchase a campervan specific sink and drain combo or build your own DIY sink using a metal bowl and steel strainer drain.

Drain Tap with Hose
In a campervan, a camp sink trap acts like a mini-version of the larger U traps under a household sink. The purpose of this is to pool a little bit of water creating a seal that keeps odors from passing through.

12 volt water pump
This is the lifeblood of the sink that is going to do all the manual work for you. Shurflo makes a popular water pump that can pump 3-gallons of water per minute. It draws a maximum of 7.5A when running. This specific pump comes with 16AWG wire that should be run to the fuse block with a 10A fuse.

Accumulator (optional)
One of the complaints of 12V water pumps is that they can be quite noisy when turned on. Because of this, you will not want to have the pump on all the time (not to mention the energy savings). Accumulators act as a pressure chamber storing a small amount of water each time the water pump is turned on. This means the sink can still run later when the motor is off. Using the sink without the pump will be a huge advantage in the middle of the night!

A larger accumulator will give you more water during the periods in which the pump is off. Accumulators also make the faucet stream run more steadily. An electric pump in itself might give off a choppier water source as it works to pump.

Although this part is optional, because accumulators are relatively inexpensive we recommend installing one if you are going the route of an electric sink.

Tubing
Expandable hoses that are lead-free can be difficult to find. We recommend using food-safe tubing for your plumbing.

Switch
You will want to install the switch in an easy-to-reach area so your motor doesn’t have to be on 100% of the time. This can also serve as an emergency shut-off in the event that there are any leaks.

Connecting Your Water Systems

The connections between your tubing and water system components are going to vary greatly depending on what you buy. If you choose to purchase camper specific parts and standard sizing as listed above, there shouldn’t be too much extra construction involved.

If you are manipulating your water tanks with custom connections there are a few tips to follow:

  • Plastic fittings should be used in place of metal fittings so the treads do not damage the tubes
  • Plastic thread sealant should be used for sealing threads (use a sealant not a lubricant!)
  • Hose clamps can be placed on top of the tubes to keep everything tight

Adding a hot water heater

It takes a lot of energy to heat water, and installing a water heater involves more than just a quick connection. Often people will rely on propane installations to heat their water. Because of this, we recommend looking into separate portable shower systems. We aren’t going to get into installing a hot water heater in this article, but here are a few products to get you started!

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