So you need a water tank

It’s no surprise that we are all finding ourselves faced with the question, ‘Should I get a water tank?’

The answer is yes.

With the ever-changing climate and the impending threat of water shortage broadcast on the roadside signs, news and radio, we have little to no choice.

We need to save every drop of water we can.

In addition, if your water pressure has dropped drastically and you really just want to have a good shower, we can help.

One of the solutions to both the lack of water and that of pressure is to do what we have done here at JV Waterproofing.

  1. Build a custom sized water tank to match the required need.
  2. Install a pump to deliver guaranteed pressure from the tank.


The first thing you need to ask yourself is ‘Where will I get the water from?’

You can look into boreholes, underground water, converting your swimming pool water, rainwater harvesting, and a few other options.

We will be discussing rainwater harvesting in this blog post.


‘What will I use the water for?’

This is probably your most important question and will determine what you will need.

Whether you’re planning on using the rainwater to water your garden and nothing else, or if you are planning to use the water as potable water in your house…

buckle up.

In the following blog we will try to set out what you may require.


Rainwater harvesting

This is the easiest and most affordable way of storing water for household use.

There are a few basic things you will need for this job:

  1. A tank (obviously) to store the water in. These tanks are available in most sizes and shapes. They’re not very pretty and are in high demand at the moment, so they are pretty hard to get a hold of. You can also take a different approach as we have done and have a custom water tank reservoir made and waterproofed using the JV Waterproofing cement based system.
  2. PVC piping to divert your rainwater from gutters and storm water outlets to your tank.
  3. While collecting this water, you want to strain and filter it as best possible. One of the best methods of filtration is to use a four-part filtration system as follows.
    1. A leaf catcher/eater/beater (it has many names but basically this just keeps the leaves and bigger particles which have washed off the roof and collected in the gutter from entering your tank).
    2. A first flush diverter. This will take all the dust and small particles that have gathered in your gutters with the first bit of rain and keep it separate(in the attached downpipe) before allowing water to flow into the tank itself.
    3. A tank screen to catch any medium-sized particles that might have gotten through to this point and keep it from entering your tank. Your water will discharge directly onto this screen and will then seep through straight into your tank. It is also advisable to install a filtration blanket above this screen which will help to filter the water further. These filtration blankets are custom-made at JV Waterproofing.
    4. A lid. This will keep your filtration blanket and tank screen cleaner for longer and also prevent any particles from blowing in underneath the edges of the tank screen. Custom-made lids will come with custom-made gaskets which will prevent debris from entering your tank at the interface between the lid and the top of the tank while still allowing water to enter from these points.


You will also need to realign all your gutters to facilitate flow to the exit point of the gutter to the leaf catcher (your tank).  (Make sure your gutters are big enough and your outlet to the tank is big enough to handle the water flow when it rains)


During this realignment process it will be a good idea to close off other outlets in order to redirect all storm water to your tank for storage.


It is important to understand that the cleaner your water is as it enters the tank, the less often you will have to clean the tank itself. This is why good planning and decent filtration up to this point is important.

JV Waterproofing will happily help you design the perfect filtration system based on your needs.


Should you wish to use the water for household use, drinking and cooking, a method of filtration from the tank to the house is recommended.

Choosing a filter is a bit more complicated.
Your filter will depend on the quality of the water in your tank as well as what you would like to use your water for.
If you are planning on using this water for drinking and cooking you will need quite an aggressive filtration system.
There is a lot of information to go through when choosing a filtration system. This company provides a lot of information conveniently with the use of videos.


A pump may be required to facilitate this filtration which will, as a byproduct, guarantee correct pressures for household usage.

Your pump will depend on the size of your house as well as that of your tank.
There are many pumps on the market, and many knowledgable people in this field.
DAB pumps have an extensive range and will have a pump to match your exact needs.
Companies like Turf AG and Agrico have staff members that are knowledgable and will be more than happy to answer any questions you may have.


The pressure to the house is a constant 3 bar, since the pump installed is a variable speed pump which maintains a constant pressure to the house.


This tank holds up to 4 kl of water.

See it in action!!

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