Water Storage Solutions: Municipal Backup

Provides an uninterrupted, pressured and potable water feed.

Municipal backup

JoJo Tanks Municipal Backup Solution consists of a tank that is tied to the main water supply line and fills automatically when mains water is available. This water can then be used in the event of a water cut, providing you with an uninterrupted, pressured water feed that is clean and safe for household use and consumption.

Municipal Backup Benefits

  • Uninterrupted water supply
  • Pressured water feed
  • Water fit for consumption
  • No additional filtering required
  • Reduces reliance on regulated water

System Components

System Components

1. Tank

2. Base / Plinth

3. Pump

4. Pipes

Assumed ¾ inch galvanised pipes
4a. 25mm diameter (minimum) from tank to gate valve, to pump.
4b. 20mm diameter (minimum) from pump to house, to tie into mains.
4c. Supply tank with municipal feed to float valve at the top of the tank.

5. Elbows

Sizes vary according to pipes (quantity will vary based on the setup).

6. Gate Valves

To isolate components and manage the system.

7. Non-return Valves

To ensure no back pressure to the main supply.

8. Float Valve

To control the fill height of the tank (pay careful attention to the height for best results and to ensure that the tank is level).


This is an example of a basic Municipal Backup System. Each installation will vary based on the setup and your personal preferences. It is advised to make use of a plumber/professional installer as the system is required to tie into the building’s main water supply line.


Here are two tips to prolong your system’s life, reduce the potential for damages and ensure you enjoy maximum benefits:

1. Keep your tank clean

Inspect the inside of the tank every 3 months to make sure that everything is in order. If it is not clean, identify the cause of the problem - your lid might be loose or an overflow pipe might not be covered correctly.

2. Rotate the water

Under ideal circumstances, municipal water can be stored inside a JoJo tank for extended periods of time due to the fact that it is chlorinated. To keep your water fresh, however, it is recommended to rotate the water every two weeks.

Tip: Draw up a roster for your tank and rotate/circulate the water at set intervals by using it to wash your car, fill up the pool, water the garden etc. This will get the water level down inside your tank, after which you can fill it up with fresh municipal water.


Intallation guide

1. Pre installation

A. Choose a tank

How to calculate which size tank you require for municipal backup:

Size of tank = litres p/day x total days backup required. i.e. 4 x people (600 litres) x 3 days = 1800 litres


B. Tank placement

The tank should be placed where municipal supply can be intercepted before entering the house.

C. Base/foundation

Tank must be installed on a sound, level and smooth surface. Level paving will suffice, or a properly designed tank stand. Alternatively, a plinth needs to be built, ideally with a concrete surface bed at least 85mm thick.

D. Recommended base sizes

It is recommended that the foundation should be at least 100mm wider than diameter of tank.

750lt Slimline760mm860mm
1000lt Slimline840mm940mm
10 000lt2200mm2300mm

2. Installation

1. Base/concrete plinth

1. Base/concrete plinth

Ensure that the tank is installed on a suitable base. The base must be sound, level, smooth, free of any protrusions and at least 100mm wider than the base of the tank (refer to pre-installation).

2. Plumbing – tank to pump

2. Plumbing – tank to pump

Use a pipe of minimum 25mm in diameter from the tank, to the gate valve, to the pump. Connect the pump to the electrical main supply.

3. Plumbing – pump to house

3. Plumbing – pump to house

a. Use a pipe of minimum 20mm in diameter from the pump to cut into the mains (where possible), before PRV-valve.
b. Install a non-return valve (between house and mains) to ensure no back pressure to mains.

4. Supply tank with water

4. Supply tank with water

Supply the tank with municipal feed to float the valve at the top of the tank. When full, the float valve will close the water supply and when it drops, it will open and allow the tank to be filled.

5. Fill the tank

5. Fill the tank

Ensure that the gate valve is open and fill the tank using municipal supply.

6. Recommendation

6. Recommendation

It is recommended that the water is run once every two weeks in order to rotate the water and ensure that the system functions properly.

Buy a JoJo Tank

Join the JoJo family today.

Find your nearest JoJo Tank distributor by either searching your area or using the handy mapping functionality.

Find a Distributor

Install a JoJo Tank

Whether you’re looking for an installer or prefer the DIY-route, we’ve got all the information you need.

The installers listed below have been carefully screened to ensure that they have the right equipment and level of experience to provide you with satisfactory service.

If you’d prefer to install your own tank, please consult our comprehensive, easy-to-use DIY-Installation Guide.

Find an Installer

DIY Installation

Why JoJo?

10 Year Warranty

Tank Benefits

When you purchase a JoJo tank, you invest in a high-quality product from South Africa’s leading manufacturer of polyethylene tank solutions.

Our products offer the following benefits:

  • All JoJo polyethylene products come with a 10-year guarantee (extended from an 8-year guarantee as of 1 September 2017).
  • Tanks are available in different formats, with a variety of fittings and accessories to extend performance capabilities and versatility.
  • Products are manufactured with the best food-grade, quality virgin LLDPE.
  • With a UV-stabilised outer layer, our products are designed to withstand the harsh African climate.
  • The food-grade, black inner lining in our water tanks prevents algae growth and keeps water fresher for longer.
  • A stringent quality-control system ensures that products meet specified design standards.
  • All JoJo Water and Chemical Tanks are manufactured in accordance with the specifications outlined in SANS 1731:2017*
  • All Vertical, Horizontal and Septic Tanks carry a quality certification from the Agrément Board of South Africa.

Find more information on our compliance to Industry Tank Standards here.



How can we help you?

Find the answers to your most Frequently Asked Questions.

Read More


From filters to tanks, JoJo offers a wide range of solutions to suite various applications including domestic, agricultural, industrial and commercial.

Having trouble finding the ideal solution for you? Have a look at what we have available and don’t hesitate to ask for assistance should you need any guidance.


Find installation guides, brochures & specification sheets, our 10-year warranty and other important documents here.

Read More

For enquiries contact 011 695 8300 or email productinfo@jojotanks.co.za

error: Alert: Content is protected !!