Clean It Up

UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: tony braid on August 18, 2015, 07:46:31 pm

Title: Ro reading
Post by: tony braid on August 18, 2015, 07:46:31 pm

Hi Guys
I am using 4000 litres a week through my membrane from new how long would it take before this starts to read
Regards Tony

Title: Re: Ro reading
Post by: Avo on August 18, 2015, 07:57:18 pm

Don't understand your question Tony mate  :) explain more

Title: Re: Ro reading
Post by: tony braid on August 18, 2015, 08:34:41 pm

Hi Avo thanks for your reply mate  what I am trying to say is I put a brand new membrane together reading nothing
Now after 8 months using 4000 litres a week it is now reading 18 is this the norm ?
Look forward to your reply

Title: Re: Ro reading
Post by: Don Kee on August 18, 2015, 08:41:01 pm

Is it reading 8 after your D.I (resin) or actually after the membrane?(before D.I)

Title: Re: Ro reading
Post by: Avo on August 18, 2015, 08:48:48 pm

What's your tap reading because this will go up and down at different times of the year which will send your rejection rate up  mate..

Title: Re: Ro reading
Post by: tony braid on August 18, 2015, 08:59:17 pm

 Hi Don it is reading 18 after membrane before it goes through DI
Avo my tap reading is 98 at the moment
Thanks guys for your reply
Regards Tony

Title: Re: Ro reading
Post by: Avo on August 18, 2015, 09:04:10 pm

You shouldn't be getting over 10 tds really with a tap read out like this..
2 or 4 is more like it..

What size membrane 4040??

Title: Re: Ro reading
Post by: Don Kee on August 18, 2015, 09:05:22 pm

It does seem like its risen too quickly mate, usually you should get 95% off the solids taken out (so around 4ppm)


What type of membranes are you using (40/40 or 150gpd) and do you flush regularly?
Also, what pressure do you have running through the R.O?


(Edit - avo beat me to it!)