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Rainwater Harvesting & Greywater Recycling system specialists: Freewater UK

Rainwater harvestingRainman™ Twin Pump - system comparison

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


System Features 'Microrain' Microprocessor (I R M Patented Technology)
  • R I M (Remote Integrated Measurement) tank level display in %, no sensor cable
  • R I M auto maintenance of minimum tank level with mains water, no float switch
  • Pressure/flow sensors, to switch pump on and off, no moving parts
  • Auto test run of system every 30 days, Pump, filter wash, mains water valve
  • Ability to manually test run system components in, manual mode
  • Timed automated filter wash, 14 day cycle
  • Leak at wc, outside taps etc, error message
  • In-house pipe break, system shut down
  • B M S alarm signal facility, 24v open, option on Elite
  • Pump run dry protection, shuts system down to protect pump
  • No other system can offer RIM remote features
  • Virgin HDPE (High density polyethylene), one piece rotational moulded tank
  • Heavily ribbed robust, stand on sand, back fill with sand or spoil taken out
  • Push fit spigot connections, 110mm inlet, overflow and service duct
  • Common service duct, carries pipes, cables and mains water to tank
  • Telescopic dome to finished level, pull up to finished level
  • When comparing HDPE tanks, compare weight for strength
External range of filters
  • External cross flow filter, best on the market
  • Grundfos SPO range of pumps, superior pumps without question
  • Pump complete with floating extraction hose and filter sieve
  • Expected life span in excess of 20 years
  • No other rainwater system company offers this range of pumps as they are expensive
A quality system
  • In-house consol pre wired and plumbed
  • All in-tank components pre-installed, pump, filter etc
  • Less than 16 hours to install
  • Fit and forget technology


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