[andrewlefkas]

First post for me so be gentle please ! Wondered what folk think to my system?
Just set up rainwater harvesting system with 1000l storage tank in back garden. I pump to a 100l water butt in garage .The rainwater round here -Leeds - is around 35 tds . I pump from butt  in garage through RO with RO waste going back into water butt .The waste comes out at 35 i.e same as it went in. The product water is 0 -1 tds .
The water from the garage butt is pumped to a high pressure pump which is between pre-filters and membranes , takes 50 mins to fill 25 litres of pure water .
I just leave the waste going back into water butt but obviously have to top up from main tank when it gets low.I probably have explained this in a crap way so I hope you see what I mean .I  have virtually no waste because the 35 tds rainwater keeps going round and round , my thinking is that when I used tap water comming in for us at 168 ish and all RO waste going down drain and higher water bills . Seems to work well for me with satisfaction of saving on water bills and I hate seeing RO waste going down drain so makes me feel good.As the TDS for rainwater is so much less than our tap water - about 5 times less -then my RO membranes should last just as long if not longer .Anyone any thoughts ?

[Jeff Brimble]

Theres loads up there, make sure you have a method of turning it off, I find that if you start "making water" approx 20 min after a reasonably heavy rainfall you can collect at 000tds
Good for you 

[andrewlefkas]

 
Haha
well to be honest I waited a full week before we had any rain worth having - couldnt belive such a dry spell in December ,anyway lots of rain now and stroage tank nearly full .
I just need a way of stopping 100l of water becoming an ice cube if we gate same cold stuff we had last year !

[Jeff Brimble]

I boxed mine in with poly foam panels, but more importantly raised it on concrete blocks on end and was able to put a small oilfilled rad under it and fill barells from the tap.You could hang an eleccy  towel rail heater rod in the top or use a fish tank heater.