50/40mm Full Thread Reducer

A fitting with a larger male thread on the outside and a smaller female thread on the inside that allows for external or internal connections.

50mm/40mm Full Thread Reducer

The 50mm/40mm Full Thread Male/Female Reducer is the new standard fitting used as an inlet for both our Vertical Water Storage Tanks and the Slimline Range. The 50mm male thread is fitted to the tank, while the 40mm female thread is utilised as a connection point on either the inside or outside of the tank.

Note: if you bought a JoJo water tank prior to the year 2020, and you want to fit an accessory to the inside of your inlet, you will need to purchase this fitting. Prior to 2020 our old reducer was used, which only allowed for an external connections.

Product Benefits:

  • Allows for connections on the outside of your tank overflow,
    as well as both the inside and outside of your tank inlet
  • Easy to fit, clean and maintain
  • Ideal for municipal back-up and rainwater harvesting installations
  • UV-stabilised
  • Extra strength
  • Robust construction
  • Water-tight seal


  • Application Leaflet



50/40mm Full Thread Reducer: Available Colours

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Install a JoJo Tank

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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@jojo.co.za

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