Domestic Rainwater Harvesting Systems

offer 10% discount

Why buy a Freerain system?

domestic rainwater harvesting schematic

  1. We have over 15 years experience in designing, manufacturing and importantly, using systems ourselves on our own housing developments. Now with over 4,000 domestic systems in service in the UK.
  2. We manufacture our single piece storage tanks in the UK, from virgin p.e. and carry a large stock for immediate dispatch.
  3. We offer both direct pressure and header tank control systems at the same price, there is no "up-selling" or premiums, let's just get it right for you and your project.
  4. We offer packaged systems for purchase directly from the factory online, but equally, if you wish to contact us for specification help and to discuss you project, please call 0845 1250 000 or email sales@freerain.co.uk.
  5. Finally we are UK company, manufacturing in our own plastics factory.

See our domestic case study examples page for more information

An overview of the Freerain solution

A rainwater harvesting system generally consists of four main components and these are:

  • Underground storage tank
  • Simple mesh filter (usually situated in the tank)
  • Submersible pump
  • Control system, either direct or via a header tank

Key Features of the Rainwater Harvesting Range

1. Underground storage tank

rainwater storage tank 1800 litresThe Freerain underground storage tank is firstly made by us in the UK, it has been designed to hold good volumes of water, whilst keeping the excavation depth to a minimum.  The tanks are made with virgin polyethylene plastic, allowing for a non-concrete base and backfill installation.  (pedestrian loading only).  The tanks come pre-fitted a BS8515 required calming inlet, in-tank filter and a telescopic neck with pedestrian cover. (see individual system pages, for dimensions).  The tank has three DN100 spigots, these are used for rainwater inlet, overflow outlet and the third as a service duct.  Note, larger tanks have an optional secondary neck to allow for a much larger filters for extensive roof areas.

2. Filtering

rainwater harvesting filter unitThe systems are pre-fitted with a suitable filter (some system sizes have optional filter upgrades), this filter is installed into the neck of the storage tank and removes leaves, moss and other debris from the incoming water.  The clean water simply washes through into the tank.  The filter contains no consumable parts and therefore it only need to be cleaned by simply washing the mesh under a running tap, a few times per year (2-3 on average).  The filter is approximately 95% efficient, meaning very little water is actually wasted.

3. Submersible pump

sumbersible pumpThe pump in a rainwater system is really the only moving part of the whole system and therefore, it is important to ensure a good quality pump is used.  Another important point, is that we only use submersible pumps in our rainwater harvesting systems.  Some other systems use surface-mounted pump sets, sometimes also suction systems.  The main disadvantages of these systems, is larger, more noisy kit in the house and secondly, the pump is having to suck the water out of the tank and this is known to be less efficient that pushing the water, as a submersible pump does.

4. Controls

Freerain offers two distinctive methods of not only controlling how the stored water is delivered to the various points of us, but also how the mains water back up system operates.  There are two different systems, these are: 1) Direct pressure and 2) Indirect (Header tank).  With a Freerain system, there is no price difference between the two different control systems, leaving you free to choose the most appropriate system for your project.

The direct pressure system, water is delivered directly to the point of use and the pump is energised until the resting pressure in the pipe-work is restored.  Mains water is then fed back into the storage tank to hold a minimal volume of water in the event of low rainfall.  The system includes a class AA air-gap as required by water regulations.

The indirect system, also called the header tank system works in a very different way.  This system includes an 82 litre header tank, which has a clever delay action device.  This allows for multiple WC flushes (or equivalent water demand), before the pump starts.  The main advantage is that the pump is starting much less frequently, which in turn helps to reduce wear and also saves electricity.  Mains water is controlled by the header tank and should the underground storage tank become too low to replenish the header tank, mains water is introduced into the header tank.

Accessories and other items

The Freerain systems come complete with all the necessary parts to make a system work, they also include all the identification markings and signs to comply with water regulations.  A roll of green/black MDPE pipe, which runs between the submersible pump and the controls is included too.

If connecting the overflow from the tank to a stormdrain or if there is doubt over the effectiveness of the soakaway, then it is prudent to add the optional "one-way valve" to the system.  This protects the tank from overflow water entering the tank.

Remember for a limited time we are offering a 10% discount off the prices shown below.  

Display: List / Grid
Show:
Sort By:
1800 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 1800 litre is..
£1,884.00
Ex Tax: £1,570.00
2600 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 2600 litre is..
£2,094.00
Ex Tax: £1,745.00
3400 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 3400 litre is..
£2,400.00
Ex Tax: £2,000.00
4400 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 4400 litre is..
£2,640.00
Ex Tax: £2,200.00
5200 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 5200 litre is..
£2,880.00
Ex Tax: £2,400.00
6800 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 6800 litre is..
£3,120.00
Ex Tax: £2,600.00
8400 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 8400 litre is..
£3,420.00
Ex Tax: £2,850.00
10000 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 10,000 litre ..
£3,810.00
Ex Tax: £3,175.00

Freerain is a trading name of Rototek Ltd and operated by Gusto Direct Ltd
Company registration no. 07454710 (England & Wales | VAT no. GB116901824

Telephone sales 0845 1250 000 email sales@gustodirect.co.uk