Rainwater Harvesting There is 1 product.

What is rainwater harvesting?

Rainwater harvesting is a technique used for collecting, storing, and using rainwater for domestic or commercial uses. The rainwater is collected from various hard surfaces such as roof tops and/or other types of manmade above ground hard surfaces. The most common way of collecting and using rainwater via roofs and guttering is in water butts(click here to see our full range of designer, classic or basic water butts) or containers and then use on the garden or for other external uses such as car washing, patio, deck (click here for our composite deck options) or window washing.

Larger rainwater harvesting systems can be used for domestic (click here) or commercial (click here) projects. 


There are many advantages to a rainwater harvesting system

  • Makes use of a natural resource and reduces flooding and storm water runoff
  • Reduces the demand on the Region Water Supply System
  • Excellent source of water for landscape irrigation
  • Home systems such as water butt can be relatively simple to install and operate
  • If you have a metered account you can significantly reduce your annual water bill
  • Promotes water conservation

Rainwater systems come in all shapes and sizes, from simple catchment system like a water butt to large above and/or underground cisterns with complex filtration systems that can store thousands of litres of water. Most rainwater collection systems are comprised of the following basic components:

  1. Catchment area is a surface from which rainwater can be collected. Roofs are the obvious catchment area. However, general paved areas such as paths, roads and car parks can be made suitable.
  2. Gutters and drainpipes channel the water from the catchment area to a holding container such as a barrel, cistern etc.
  3. Initial filtration removes or catches debris such as leaves before it enters the storage tanks.
  4. Storage tanks can be above-ground or underground. Storage tanks can be constructed in a variety of materials and designs. To inhibit the growth of algae, storage tanks should be opaque and preferably placed away from direct sunlight. The tanks should also be placed close to the areas of use and supply line to reduce the distance over which the water is delivered. Also consider placing the storage at an elevated area to take advantage of gravity flow. The tank should always be placed on a stable and level area to prevent it from leaning and possibly collapsing. The size of the storage tanks is very important as the balance between the water volume that can be supplied and the demand for use of water needs to be considered. There may also be a requirement for a high-level header tank that is usually pump filled from an underground tank.
  5. Delivery systems can be gravity-fed or pumped to the landscape or other end use areas such as a high level header tank.  All pipework carrying rainwater from the underground tank to the header tank and from the header tank to water fittings must be clearly marked as a non - potable water supply
  6. Mains water top up is also required for the system in the event of a prolonged period with no rainfall.
  7. Purification/treatment system such as UV may be required depending on the end-use

What is and why do I need a Home/Business Suitability Survey?

Rainwater harvesting is new to Ireland, there are many different types of rainwater harvesting products available, but only one is suitable for you and your water needs.

Using your knowledge of your home/business and calculating your water usage based on what your water needs are. We can determine

  1. Your properties water production capacity
  2. Your homes/business water usage
  3. What is the right type of product for you, based on your needs and your building production capacity

Using production capacity, usage and budget. We will recommend the right system. Not all homes and gardens can be serviced by a water butt. But just as, or even more important, not all homes need to be supplied or can be supplied by a rainwater harvesting system. Knowing what is the right type of system will save you money.

For business, not all premises can bury tanks under ground for collection and storage. RainWater TSS offer over 300 tank types and sizes including beautifully crafted overground tanks to compliment and work with your building so that you will achieve water cost savings. With little capital cost.


Contact RainWater TSS or your local installer from our installer list for a FREE home/business suitability survey which will help you get the right system for your home or business.

Call us today at (021) 206 1913 or e-mail us at [email protected]  


€ 1,750.00
The Carat-S tank is different from traditional tanks. Made from a robust PE plastic, the tank can arrive to site in 2 halves to allow easy access to the back of a home removing the need for a crane. The tank can be backfilled without the need for concrete. A simpler and more cost effective installation PRICE INCLUDES DELIVERY AND COMPONENTS (See More Info)
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