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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 using the menu. 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.
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 Rainwater Utility Tank
1500l Rainwater Utility Tank
£739.00
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 pl...

Car Wash Rainwater Harvesting Package - 1000 litre tank, downpipe filter and hozelock tap
£249.00
Looking for Rainwater Harvesting for Car Washing? then look no further. This is the entry level rainwater harvesting kit for commercial car washes. If your car wash facility has an outbuilding or canopy this is the perfect solution to reducing your water bills. Car washes that have installed this system report a payback as quickly as 6 months....

Carat Rainwater Harvesting System 2700l, 3750l, 4800l and 6500l
£2,059.00
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 ra...
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
£4,099.00
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. Direct Rainwater Harvesting System - the most cost effective soluti...

Freeflush Domestic Rainwater Harvesting System 1500l, 3000l, 5000l and 7500l
£1,499.00
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 ra...
Freeflush Gravity Rainwater Harvesting System

Freeflush Gravity Rainwater Harvesting System
£239.00
This system components are available for inspection at the Centre for Water Saving Technology. If you need assistance with tank sizing use our rainwater harvesting calculator here or our garden rainwater tank sizing blog here. Our guide on gravity fed rainwater harvesting is here. The system includes all the components which are required for...
Freeflush Pump Packages with Mains Top Up

Freeflush Pump Packages with Mains Top Up
£779.00
Four main pump packages are offered without tanks if you require the complete solution with tank please see listing for rainwater harvesting systems: 1. Garden Comfort Package for irrigation only 2. Direct Rainwater Harvesting System - the most cost effective solution. A submersible pump maintains pressure and delivers rainwater where it is re...