I have a Flexeon 300, never been used for sale if you're interested.
This is it here:
http://www.gapswater.co.uk/acatalog/Titan_reverse_osmosis_systems.htmlIt's the wall mounted one. Not totally brand new as it's been stored in my garage, but never been used (ther than to test that it works - it does) and in perfect working order.
It has twin booster pumps (24v), so it doesn't matter what your home water pressure is.
It will produce about 1,000 litres of pure water per day, and has an automatic flush function that flushes the membrane for 30 seconds every 30 minutes.
It also has a pressure sensor to if you shut off the output water, it will switch off the pumps and the shut off the input water too.
It's a good piece of kit. I bought it, but then a friend gave me a 4040 setup so I didn't need it anymore.
I paid about £1,000 back in the day. Yours for
£999 a sensible offer!