[andy east sussex]

ive just built a trolly system and i live in a hard water area what do i need to start makeing pure water rather than buy it off a window cleaner for £5 a day what i dont want to pay so any advise needed cheers guys.

[Tim Morton]

Hi Andy, what you need is a Reverse Osmosis unit. There are many different units out there, the differences between them is usually in their daily capacity measured in Gallons Per Day. (and that's american gallons )
I have a Ro-Man pumped 200 GPD (gallons per day) unit and I produce 420 Liters in about 14 Hrs into 2 210L water butts. My tapwater TDS is 144-148 and my Ro output is 1-1.5 TDS
My brother has a 4040 Ro unit, it produces a lot more than mine, but i never use more than 375 L per day.
One thing to watch for is, Ro units produce waste water as well as pure water, some produce up to 5 times as much waste as pure, and if you're on a water meter that would be a concern. The better Ro units produce as much waste as pure water.
Try these for Ro units, http://www.gapswater.co.uk/acatalog/shop.html and http://www.ro-man.com/

Hope this helps.
Tim

[sair]

you can come round and see me andy and look at r/o or you can get two di vessels and make it yourself or you can by from me 10-15 1000 liters we are just round corner at mayfield 07944 227635  01435873555

our 40x40 units only waste about 20-25 % water doen the drain

[carl clearview]

Hi Andy,
purifing water is a straight forward process but you have to spend some cash. if you go for a di resin based system the inital expense is low, however, running costs will be alot higher. if you go down the R/O route your running costs will be less but the inital investment will be larger. the same applies with R/O systems. the more cash you spend, the better the quality of the kit and the longer it will last, further reducing running costs. how much work do you do?

[andy east sussex]

how good is the reverse osmos do you still need a tank or can u put a hose on it and fill the tank that way or would that way take to long?
i might take you up on the sair.

[Paul Coleman]

how good is the reverse osmos do you still need a tank or can u put a hose on it and fill the tank that way or would that way take to long?
i might take you up on the sair.

Reverse osmosis can purify the water really well but the level of purity can depend on your set-up. However, for practical purposes, it doesn't purify fast enough for you to use it as you purify so you would need some kind of storage tank with a pump (either in your vehicle or a static one).  You would probably need to run the RO'd water through resin.  This would purify fast enough as you use it.
I have a static tank with RO unit.  I leave it purifying around the clock and pump it into my van tank.  It fills the van tank within a few minutes as I use a powerful submersible pump with one and a half inch transfer pipe.  I also have an RO unit in the van as well.  That is only for when I may need to make water on site if I've got a big job a long way from base.  I've never used it yet but it's useful to have as a back-up in case the static RO goes wrong.

[carl stanton]

try this site it is what all above have said but its helpful to see the pics, dont forget to donate. 
http://www.d.co.uk/

[simbo]

what would you do if your water was 450-500 tds as mine is, ro produces too much waste for my liking, i have had my 75 gallon ro for a couple of weeks now not going all the time and tds is starting to rise already and i reckon its only produced around 800 ltrs
any thoughts welcome simbo

[Tim Morton]

I'd get a 300GPD ro-man unit, they have a 1-1 waste ratio and if you get the pumped version, it'll reduce your tds by 98-99%. I have the 200 GPD pumped and my tds in is 148, my out is 1-1.5tds. I'm gonna add  another membrane to make it a 300 GPD unit as the waste is less and the filter life gives you more pure before you need to change them.
Tim