Award-Winning Float Switch for Water Level Control | MAC3 Key Green

We’re proud to share that the MAC3 Key Green float switch has been recognised as a winner at the prestigious iF Design Awards 2026.

First established in 1954, the iF Design Awards are globally respected for celebrating outstanding design, innovation, and products that make a real difference in everyday life. To be included among this year’s winners is a fantastic achievement.

What is a float switch and why does it matter?

A float switch is a simple but essential device used for automatic water level control in tanks, pump systems, and drainage applications. It works by floating on the surface of the water and switching a pump on or off when the water reaches a set level.

This helps to prevent tank overflow, protect pumps from running dry, and ensure reliable operation in everything from domestic systems to larger commercial pump tank systems.

Introducing the MAC3 Key Green Float Switch

The MAC3 Key Green float switch builds on the proven reliability of the widely used MAC3 Key range, with a more sustainable approach. Made entirely from recycled plastic, it offers an eco-friendly water management solution without compromising on performance.

Its robust and simple design makes it ideal for a wide range of applications, including wastewater pump control, drainage systems, and water storage tanks.

Used in our pump tank kits

At Celtic Water, we use the Key Green float switch in some of our pump tank kits, helping us deliver dependable and efficient water level control solutions to our customers.

Award-winning technology you can trust

The iF Design Awards have a strong history of recognising high-quality, innovative products within the water industry. Previous winners include DAB pumps, a trusted brand that we also supply, further highlighting the level of excellence associated with this award.

If you’d like to learn more about float switches, pump systems, or the Key Green range, explore more on our website or get in touch with our team.