Simple Grey Water Systems to save water     

What is a Grey Water System?

A grey water system is a practical approach to recycling and re-using water that has already been used in your household. Grey water from your taps, shower, bath, dishwasher and washing machine is collected, stored and pumped into an irrigation system that is ready for re-use.

How can using a Grey Water System save water?

A grey water system uses a lot less clean water if it is re-used for irrigation purposes or for flushing the toilets. If you typically use 200 litres of grey water per week, you are saving 200 litres of clean water.

How much water do Grey Water Systems save?

A typical household of 3 to 4 people will use a washing machine perhaps 4 times a week. If you have a grey water system connected to your washing machine, you are saving on average 200 litres of water per week. If you own a top loader, you are saving 400 to 500 litres per week. A grey water system connected to your shower or bath can save you over 400 litres per week, depending on the average household shower time and frequency.

Benefits of using a Grey Water System

  • A grey water system is a sensible and easy way to save water
  • Requires little maintenance
  • Easy to install - if you have some basic DIY skills and simple plumbing tools 
  • Grey water is suitable to be used for toilets, which can use up to 12 litres of water per flush
  • Grey water from the washing machine can be used for irrigation - as long as the detergents are eco-friendly
PROBAC Eco-friendly Laundry Liquid 5L Concentrate
PROBAC Eco-friendly Laundry Liquid 5L Concentrate

Disadvantages of using a Grey Water System

  • If you connect your grey water system to the taps in your kitchen or to your dishwasher, you will have a build-up of fat from the oils used in cooking, which could ultimately block the system. It is recommended that you first install a fat trap
  • When you connect a grey water system to your shower or bath, there is bound to be a build-up of hair, which can also block the system. You will need a collection system that can prevent this. However, this can easily be resolved. Inside the system there is a brush that stops hair from entering, which should be cleaned once a week to avoid clogging up
  • Grey water is not advisable for irrigation purposes if it contains detergents, soaps and shampoos that are not completely eco-friendly 
  • Grey water should be used fairly quickly, within a few days, as it tends to smell. Your collection system should push the grey water either into an irrigation system immediately, or into a tank

Recommended Grey Water Systems

Grey Water System For Irrigation, The Little Grey Box

The Little Grey Box, Grey Water System

The average household uses 57% of its water on irrigation. The Little Grey Box will drastically reduce your municipal water consumption and keep your garden green.

Do you recommend using a Grey Water System to save water?

Yes, definitely. Just by connecting a simple grey water system to your washing machine, you can save 200 - 500 litres of clean water every single week. It is very simple, beneficial and works on its own.


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