Greywater Recycling

What exactly does greywater recycling even mean? Where does the water come from and what can it be used for?

Greywater is recycled water that has already once been used for dishwashers, sinks, laundry tubs, washing machines, baths, and basins. Rather than getting rid of it right away, it can still be reused for flushing toilets or gardens.

There are several advantages to this system: using greywater reduces the need for and reliance on the mains water supply system, it reduces the wastewater peak flows discharging to council’s wastewater system, and it allows gardens to be water during drought periods.

Before taking any steps to install greywater recycling at your club, it is important to get a building consent. Contact your local council to find out if this is an option for your facility.

There are some basic grey water Guidelines to note:

  1. Do not store greywater for more than 24 hours because it will start to break down.

  2. Minimise contact with greywater. A system should be designed for water to soak into the ground, and not be available for people or animals to come in contact with.

  3. Simple systems last longer – avoid filters and pumps as it requires less maintenance, energy and money.

  4. Installing a 3-way valve system will make switching between greywater and sewer easier.

Further information

The Ministry of Business, Innovation and Employment has more details about collecting and reusing grey water, as well as looking after a grey water system. BRANZ also has information material on both domestic systems, and non-residential systems which would suit a sports club.