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Rainwater Harvesting Systems
The rainwater harvesting systems and packages on this page contain everything you will need if you wish to install a rainwater harvesting system, including water butt, diverter, filter and pump. If you would prefer to buy each of these components separately, visit the corresponding pages in this section. For those new to the field, it may be easier to buy a package which includes all you need rather than having to decide on each component individually.
Water Neutraility guidance shows rainwater harvesting as the 2nd step in the Water neutraility heirarchy.
The types of system can be broadly categorised as below:
- Underground pumped rainwater harvesting systems - these are the gold standard for rainwater harvesting systems. Being below ground the system is out of the way and stored water remains unaffected by ambient temperatures.
- Above ground pumped rainwater harvesting systems - these are ideal when space for an underground system is not available
- Above ground gravity rainwater harvesting systems - these systems are a low cost solutions with no electrical input. Stored water is discharge by gravity alone.
Here is a brief description of each of these components so that you know what is included in our rainwater harvesting packages. Details of each individual kit are in the individual product pages listed below these descriptions, and links to the individual pages are in the headings.
Diverter
In most rainwater harvesting systems water flows from the roof down a downpipe (drainpipe) to the water butt, where it is stored. Diverters are the pipes used to connect the downpipe to the water butt. The most basic are used for this purpose only, whilst others also filter the water they divert.
Filter
Filtration is an integral part of rainwater harvesting systems. Filters typically remove contaminants such as dust, leaves, organic waste. Even if the water isn’t being used for drinking it is useful to remove these contaminants. In some systems a filter is placed in the diverter, whilst in others it’s in the downpipe or in the water butt.
Water Butt
Water butts are containers used to collect rainwater. They are often made from plastic and are usually placed on the ground. However, they can also be wall mounted.
Pump
However the rainwater you collect is being used, one or more pumps are usually required to move the water from the water butt to where it is needed. Pumps placed inside the water butt are termed ‘submersible pumps’, whilst those placed outside are termed ‘non-submersible’ or ‘above ground pumps’.
1500l Above Ground Rainwater Harvesting System
1500l Above Ground Rainwater Harvesting System
£899.00
This new water tank combines excellent German innovative design and quality construction with a simple finish - perfect for the outdoor space. This tank has a huge 1500l storage capacity with a minimal footprint (120 x80cm) This is a very solid construction dissimilar to other cheaper thin walled tanks available online. The thick opaque pla...

1500l Shallow Dig Domestic Rainwater Harvesting System 3000l, 5000l and 7500l
£1,969.00
This system is available for inspection at the Centre for Water Saving Technology. We highly recommend inspecting this product, particularly the pump, as the main components are significantly higher quality than anything else on the market. If you need assistance with tank sizing use our rainwater harvesting calculator here or our garden rai...

2000 litre two part rainwater harvesting tank
£599.00
This two part 2000 litre rainwater harvesting tank represents a step change in rainwater harvesting and attenuation tanks. The simple design has a number of benefits over conventional tanks. Benefits Lightweight 40kg per section fits through doorways - section height ~600mm expandable by use of couplings 10 year warranty Included Accesor...
470 litre Above Ground No Dig Rainwater Harvesting System

470 litre Above Ground No Dig Rainwater Harvesting System
£1,089.00
Rainwater harvesting systems typically include under ground tanks which allow large amounts of storage with effectively no footprint. However often an underground is not possible, perhaps access to the rear of the property is not possible, the dig depth is not suitable or there is limited space due to exiting services. This above ground micro n...
Aquacube Above Ground Packaged Rainwater Harvesting System

Aquacube Above Ground Packaged Rainwater Harvesting System
£12,169.00
**Please not these are built to order - please get in touch prior to purchase** The AquaCube has been designed to provide a self-contained, pre-assembled rainwater harvesting system that comes in two different sizes, 3375 litres and 4500 litres with larger options available upon request. The system comes with all pumps, filters, and controls in ...

Carat Rainwater Harvesting System 2700l, 3750l, 4800l and 6500l
£2,279.00
This system is available for inspection at the Centre for Water Saving Technology. We highly recommend inspecting this product, particularly the pump, as the main components are significantly higher quality than anything else on the market. If you need assistance with tank sizing use our rainwater harvesting calculator here or our garden rai...
Carat XL/XXL Rainwater Harvesting System 8,500l, 10,000l, 16,000l, 22,000 and 26,000l

Carat XL/XXL Rainwater Harvesting System 8,500l, 10,000l, 16,000l, 22,000 and 26,000l
£3,299.00
For tanks of 16,000L and above, please get in touch prior to purchase. If you need assistance with tank sizing use our rainwater harvesting calculator here or our garden rainwater tank sizing blog here. Four main rainwater harvesting packages are offered in four tank sizes and two lid options: 1. Garden Comfort Package for irrigation only 2....