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Rainwater Harvesting & Greywater Recycling system specialists: Freewater UK

Rainwater harvestingRainman™ Smartfit - domestic rainwater harvesting

The only system on the market with all in-tank components pre-installed, pumps, filter etc. Install tank, connect pipes, switch on, enjoy !

More information > System comparison > Download A4 Brochure

  1. Rainwater from roof into tank
  2. PE tank with telescopic access & 110mm push fit pipe connections
  3. Integrated two step fine filter
  4. Rainwater Harvesting - Rainman Smartfit backplateOverflow siphon with rodent barrier
  5. Overflow to soakaway/storm drain
  6. Calmed inlet, incoming rainwater
  7. Grundfos submersible pump with floating ball & filter sieve
  8. Float switch for mains water minimum tank level
  9. Service ducting 110mm from house to tank
  10. Rainwater supply pipe from pump to pump control
  11. Back plate assembly - pre wired
  12. Mains water supply
  13. Mains water solenoid valve (float switch activated)
  14. Mains water pipe to service duct
  15. Pump control switches submersible pump on and off, on demand
  16. Rainwater connection to toilets, washing machine and outside tap
  17. Integrated pump electrical socket
  18. Integrated float switch electrical socket

Tank Dimensions

Rainwater Harvesting - Rainman Standard tank dimensions

Tank Type GET 3.3 GET 4.7 GET 6.5
A height mm 2230 2610 2840
B length mm 2400 2400 2400
C width mm 1400 1750 2080
D height mm 1745 2125 2355
Weight kg 150 200 270
volume 3300 4700 6500

Rainwater Harvesting - Rainman Standard filter

Domestic Tank Filter specifications

Rainwater Harvesting - Rainman Standard tank

Tank information :: GET 3.3 :: GET 4.7 :: GET 6.5

Water quality must meet the European Directive 76/160/EWG for recreational water. To the eye the clean water looks like drinking water, cool, clear and colourless odourless.

Rainman Smartfit has an in-tank submersible pump, automatically switched on and off by the pump control on demand. The in-tank 2 step cross-flow self-cleaning filter removes dirt particles from the incoming rainwater. When the tank level is low the float switch opens the solenoid valve allowing mains water to flow back into the tank.

The Smartfit system is simple and easy to install and simple to use, all you have to do is plug it in and turn on !

Main features

A complete system package, pre assembled where possible, made easy to install. All systems factory quality tested for water tightness and operation.


  • Manufactured from virgin polyethylene, heavily ribbed, and of robust construction. Stand on a bed of sand and backfill with spoil taken out, (not clay or sharp stones)
  • Integrated calmed inlet device, two step cross flow self cleaning filter, siphon overflow.
  • Push fit standard, 110mm pipe connections for rainwater in, overflow out and service duct to house
  • Telescopic access dome, raise to finished levels, and back fill

In house back plate controls

  • Components are back plate mounted, wired and plumbed for ease of installation. Require mains cable connection into electrical spur and 15mm mains water feed to solenoid valve
  • Auto mains water supply, maintaining tank minimum level in times of no available rainfall

"All in tank components already fitted"

  • New Smartfit system, plug and play
  • All in tank components pre-fitted
  • Pre-wired & plumbed in-house consol
  • Less than 12 hours to install
  • Single service duct from house to tank
  • Cherry picked, highest quality components used throughout
  • High quality Grundfos Pumps, expected 20 year life
  • Easy Installation & user friendly
  • The only system of choice for quick and reliable installation
  • Fit and forget technology


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Freewater UK
The UK's market leaders in rainwater harvesting & greywater recycling systems technology