Hi,I reckon I might need 150/200 litres a day.I've spoken to a couple of suppliers,one said I would need a booster pump and electrics costing £600,ro man said I should go for 200 gallon a day because the system will not actually produce this amount because of pressure, temperature ect,and also suggests you will need a pump with that system
Then on the diy wfp site Matt says 75 gallon should be ok,so now I'm slightly confused 
, anyone got opinions on this,cheers
hi billygoat
theres loads of different kind of units you can go for: small unit with 1/2/3 membranes, with/without booster pump, 40/40 unit, merlin etc, etc!
i agree with RO-Man although units may be rated at say 1000ltrs per day, in reality they will be slightly less than that. so it prob would be worthwhile bearing this in mind when choosing a unit.
also, make sure you have enough tap pressure before getting a unit that may not have a booster pump on it. this doesnt always happen, but i have seen people buy a unit (the merlin is a good example of this) that doesnt have a pump on it, and when they install it they do not get good performance due to lack of pressure. you may be able to get a pressure guage from a plumbers for a few quid, or if you know any plumbers ask them if they can test your water pressure.
i know it can be difficult/confusing at first trying to get set-up but as long as you do it right from the start you will make things alot better in the long run!
hope you get sorted mate!
