40mm Thumb End Plugs

Provides a water-tight seal for unused outlets/inlets.

40mm Thumb End Plugs

The 40mm Thumb End Plugs are used to seal off any unused outlets or inlets, preventing water from escaping the tank. Please note that thumb end plugs need to be ordered separately, as they differ from the dust plugs supplied with JoJo Tanks inside certain fittings. Dust plugs keep the tanks as clean as possible prior to purchase, but will not prevent leakage.

NB: Never close the overflow of a water tank with a thumb plug. The overflow provides an escape route for water should the tank get too full, preventing pressure from building up inside the tank. It can be covered with mesh to prevent dust or mosquitoes from entering the tank, or routed to an area where the excess water can be utlised.

Tip: Refer to the specification sheet on each product page to confirm what is supplied with each tank.

Product Benefits:

  • Easy to use
  • Robust construction
  • Water-tight seal
Thumb End Plugs


40mm Thumb End Plugs: Available Colours

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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.

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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.

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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.

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