Grey water and water tanks

Council requires all new homes to install a greywater system and/or a rainwater storage tank. Rainwater would be used for toilet flushing and outdoor water uses while greywater from the washing machine and bathroom would be used for outdoor irrigation.

Council developed the Rainwater and Greywater Code of Practice Guidelines [PDF 2.29 MB] to help residents, building industry and real estate industry understand the rainwater and greywater requirements when building (or selling) a new compliant home.

Tank options

Council has developed performance standards for two acceptable water management solutions:

10,000 litre tank connected to toilet and outdoors
Suitable for properties with plants suited to Kāpiti conditions and want water to wash the house and car.
4000 litre rain tank and greywater diversion
A greywater system provides a constant supply of water for outdoor irrigation - Council only permit's systems that allow outdoor irrigation.