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Rainwater Harvesting and Collection

Start rainwater harvesting and boost your rain collection efforts by choosing the right pump, so that water goes where it needs to go. Contact our team today for help.

blue question mark symbol in a circleWhat is rainwater harvesting? It sounds fancy, but rainwater harvesting is simply collecting rainwater in a tank to be reused around your home.

Rainwater collection from roof

Surviving a water shortage – how rainwater harvesting is the way of the future

New Zealand, and particularly the North is no stranger to water restrictions with one in a 100-year droughts experienced in Auckland and other parts of the country over the past couple of decades.

So it stands to reason that regional authorities have, and will continue to, look at options to treat household water and encourage the installation of collection and re-use facilities.

Fortunately, harvesting rainwater at home is something homeowners can do now to ensure they are not relying solely on an uncertain municipal supply. Wherever you are in the country, if you have a rainwater harvester that is sitting idle or if you want help to get one up and running – PASLR is here to assist you.

How can rainwater be utilised?

Rainwater can be harvested and used for a range of different applications; for watering the garden or washing the car, for use in the laundry and toilet, or it can even be used as the sole water source for the family home including drinking water. Depending on how you want to use the rainwater there are several options available.

What do you need to harvest rainwater?

Due to the ongoing concerns with municipal water supply, many new builds are now required to have some sort of rainwater harvesting specified, but what specific tools do you need to harvest rainwater?

  • Water tank. Most rainwater is harvested directly off the roof of your home and travels down through pipes to a water tank, that sits either above or below the ground.
  • Gutter guards. While not essential, gutter guards help reduce organic matter from entering the water tank. Regular tank sterilisation is also recommended.
  • Water pump. You’ll need a pump (submersible or surface) to transfer the water from the tank to where it needs to go. The size of the pump will depend on what you are using the water for e.g., the whole house or just the garden.
  • Automatic controller. We also recommend a controller such as the Davey Rainbank, which automatically selects the water source you draw from—with rainwater given priority over mains supply. Mains water will be supplied when the tank is empty or in the event of a power outage.

blue information symbol in a circleDoes tank water affect water pressure?

Many people still assume that you’ll never get adequate pressure if you’re using tank water, but in the 21st century, this simply isn’t the case! With the right pump, there’s no reason why you can’t enjoy high water pressure from your tank. Find out more about choosing the right pump.

Two-barrier approach: filtration and disinfection

Although collected rainwater is generally very good regarding mineral and chemical components, it is in MOST CASES contaminated with microorganisms from the faecal matter of birds, possums, cats, mice, and rats.

If you want your rainwater collection system to be used for everything, including bathing, cooking, and drinking, then the Ministry of Health recommends enlisting a two-barrier approach, namely, filtration followed by disinfection.

Although we can provide a number of solutions to suit your requirements, the simplest solution is to follow a three-stage filtration model which includes cartridge filtration (coarse and fine) followed by ultraviolet disinfection (UV/liquid disinfection).

Take a look at how the Davey Rainbank EVO works and how easy it is to install.

Davey Aquashield water saving solutionNEW! Davey AquaShield 2.0 Competitive pricing, incredible benefits

Davey AquaShield 2.0 has two superior plug-and-play packages for domestic water boosting and treatment. The perfect solution for rainwater harvesting or switching between tank and mains, the system delivers constant pressure, energy efficiency, and water savings for medium to large homes.

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