[L.Doubtfire - The Blade Runner]

Hi Jeff, you usually wait half an hour so after it starts raining before ya start
To collect right? So you wait then till your reading shows 1 ppm and your away?
I`ve been collecting all afternoon and my reading is 10ppm.Everything clean
Before I started.Last summer when I did`nt take half as much care,my reading
Would be 2ppm.Then the flies and midges,muck in the air would take over and
After a couple of days it would be up to around 15ppm.Any hints or tips as to what
I might be doing wrong.? I`m just a bit disappointed really.I know I live in the
Industrial north but nevertheless,,,,,,,,,,,,,,,,,,,,,,

Lewis Doubtfire

[Jeff Brimble]

Yes very dissapointing for you.
 Is your tds meter accuarate compare with vodka Whats the Calibration- maybe 10 is 1 ?Did it register zero with RO/DI Whats your roofing materials ? Clean ?
 Anyone else achieving less than 1 tds ? or is it just me ?

The other thing that we need to think about is can rain tds be higher than zero and still work ?

[L.Doubtfire - The Blade Runner]

Hi Jeff,just done a test with my tap water that’s gone thru` my RO…. 000ppm
So it`s not my meter.Don`t know about Vodka,I ain`t got any.My shed roof is
What looks to be same as yours,mineral felt with smallish `blobs` of bitchumin
In the guttering.

Lewis Doubtfire

[Jeff Brimble]

If your refering to the gutter pic, the mineralised felts just on the edges, the rest is just plain flat felt with an alu paint coating.

[MartinB]

Williamson Pumps sell a Rainwater Harvesting Kit which may be of interest. Have a look on their New online Shop at www.williamson-shop.co.uk

[Jeff Brimble]

Martin maybe you could eloborate on what it is that it does ??

[MartinB]

Hello Jeff

We have a nice little pdf on this subject but i dont know if i can upload to the forum so i have emailed it to you.

Cheers 

Martin

[jouk45]

i get 000tds every time straight from the sky, 

[Jeff Brimble]

Martin,
Got the pdf.
But for the others that might also be interested, What does it do or allow ?. It looks like a pic of a turbine pump and a seperate pressure switch, could it also be used as a pump before the RO/DI in most systems. If so, when the rainwater butt runs dry is it just a case of refiling it with tap water ? Here is the small piece of the text Martin supplied.

 Many window cleaning companies now use water fed pole technology.
These systems require ultra clean water which is achieved using specialist filter equipment.
The RO Filtration process unfortunately means using more water than is required to fill a storage tank due to
brine water run off and if on a meter this can substantially add to all the running of a company
With purity of around 4 parts per million, rainwater is ideal for pole based window technology.
Using rainwater which has been collected, filtered for leaves/moss etc and has stood for a day or two can
provide a good source of water for the RO System
As the water collected can have a low TDS , the RO system filters have to work less hard and thus have a
longer life.
HOSEPIPE BANS
It is not long ago that such bans only occurred in the hottest, driest months of the year but
now it can happen almost anytime of the year for may people watering cans can be a heavy
time consuming business.

"

[L.Doubtfire - The Blade Runner]

Joe,if your catching the rain at 000ppm what is your interest with resin
At all ?

Lewis Doubtfire

[Jeff Brimble]

Another consideration-
http://www.cleanitup.co.uk/smf/index.php?topic=47912.0