Domestic Rainwater Harvesting Systems

 

Why buy a Freerain system?

domestic rainwater harvesting schematic

  1. We have over 15 years of 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 are 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 your project.
  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, direct supply

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 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 needs 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 are larger, noisier 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 than pushing the water, as a submersible pump does.

4. Controls

Freerain systems use 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.

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 storm drain 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.

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1800 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 1800 litre is..
£2,004.00
Ex Tax: £1,670.00
2600 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 2600 litre is..
£2,244.00
Ex Tax: £1,870.00
3400 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 3400 litre is..
£2,490.00
Ex Tax: £2,075.00
4400 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 4400 litre is..
£2,670.00
Ex Tax: £2,225.00
5200 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 5200 litre is..
£2,970.00
Ex Tax: £2,475.00
6800 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 6800 litre is..
£3,210.00
Ex Tax: £2,675.00
8400 Litre domestic rainwater harvesting system
A complete rainwater harvesting system package direct from the manufacturer.  The 8400 litre is..
£3,570.00
Ex Tax: £2,975.00
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 Atlantis Tanks Group Ltd
Company registration no. 09955291 (England & Wales) | VAT no. GB233138533

Telephone sales 0330 999 1100 email sales@atlantistanks.co.uk