[dave.e]

Hi guys i want to run this problem pass you. i started to have high tds reading out of the ro,s it was 17tds so changed all the pre filters and changed the ro,s flushed and then flushed some more and still only got it down to 14tds. i then fitted  a pump to boost the pressure from standard  55 psi to 95 psi pumped and i have still got 14tds can some one please tell me if they know what's wrong thank dave

ps the new membrains come from the window cleaning ware house in wolverhampton 3days ago.

[CLEANCARE WC]

if your getting 14 out of your ro with no di i would say your doing very well.

[dave.e]

if your getting 14 out of your ro with no di i would say your doing very well.

the thing is a mate off mine down the road with the same mains tds reading is getting 6tds out off is ro,s

[CLEANCARE WC]

hmmmnn...i know what you mean its annoying i posted the same in another thread a couple of weeks ago. guy  i know with same ro as me same tap tds yet his product tds is lower     

[dave.e]

hmmmnn...i know what you mean its annoying i posted the same in another thread a couple of weeks ago. guy  i know with same ro as me same tap tds yet his product tds is lower     

do you think the ro membains are shot because this is hacking me off now

[CLEANCARE WC]

i dont reckon mate, whats your tap tds?

[dave.e]

i dont reckon mate, whats your tap tds?

the tap tds is 267

[CLEANCARE WC]

im not the best at maths but i think that means your ro is taking out 95% of the impuritys  seriously mate your doing ok

[dave.e]

im not the best at maths but i think that means your ro is taking out 95% of the impuritys  seriously mate your doing ok

thanks mate.  when i first had the system i got the tds down to 11 so that's what i was trying to get but like you said doing the maths like that then it dose make sense

[CLEANCARE WC]

sounds good that actually what type of ro have you got? and where did you get it mate? 

[dave.e]

sounds good that actually what type of ro have you got? and where did you get it mate? 

its the 300 gl per day system i got it from peter about 7 years ago if you look at this pic its the same

[richard jagger]

Lets get some facts right first your tds is 265 if you are getting less than 26 with just an ro its very good if you got 14 or 11 it was amazing with out a D I vessel. My advice is get a ro vessel as your r o was not made to go lower that 90 % . If you are making 200 to 300 lit a day get a 10 inch or 20 inch if more get a blue 7litres .These are just filtration unit not miracle makers.

[richard jagger]

Lets get some facts right first your tds is 265 if you are getting less than 26 with just an ro its very good if you got 14 or 11 it was amazing with out a D I vessel. My advice is get a ro vessel as your r o was not made to go lower that 90 % . If you are making 200 to 300 lit a day get a 20 or 20 inch if more get a blue 10 or 25 lit vessel .These are just filtration unit not miracle makers.

[dave.e]

thanks mate. the reading that i get is tap 267 tds out off ro,s 14tds into 750m polishing unit then i have to change the resin after 3days when it get to 4tds. that's why i asked because i seem to get though alot off resin the water i get though on a daily basis is 750 lt.

[CRYSTAL1984]

I have a 40/40 with 120psi pump and water soffter
Come out ro 4tds tds in 468 in essex



www.procareproducts.co.uk

[christopher b]

well thats the awnser, its down to the size of your membrane

[Londoner]

Membranes don't last forever, how old is it?

[dave.e]

Membranes don't last forever, how old is it?

Hi mate the membrains are 3 days old so that's why i am a bit puzzled

[Londoner]

Membranes don't last forever, how old is it?

Hi mate the membrains are 3 days old so that's why i am a bit puzzled

In that case they might still be settling down and washing the preservatives out. But a Ro down to 17 tds is not bad, a bit of a polish with a DI and you are fine.

[Spruce]

Actually it should perform better than that.
Peter Fogwill once told me that those RO's should be working at 97-98% efficiency.
We use one of Peter's RO's like yours with 150gpd membranes and in the old days our water TDS was 254 and it was working at about 99% leaving us with a TDS of 3 which he advised to use as it was without polishing it off. Our water pressure is 65psi and we don't use as booster pump.
Our water quality is much better now a whole lot of pipes have been replaced (TDS of 96) and our membranes are still fine although over 4 years old.
I was once told by Ro-man when we purchased these that the best membranes to get are the American manufactured ones rather than the cheaper Chinese/Korean ones, as they perform better.

The connection diagram from Cleancare was on the Ro-man site, but the system we got from Peter wasn't connected up the way of the diagram. The Ro-man diagram shows the waste from the first membrane being used as the water supply for the second, with the second's waste being the feed for the third membrane. This means that the third membrane is having to work with water that has the reject water from the previous membranes, so won't last as long as the first one as the water passing through that membrane will have a very much higher TDS than the tap water.
Peters Ro's had a splitter after the carbon filters that divided the water into 3 and feed each membrane with the same water ie in your case 265. Then each of the pure outlets were connected together as were the 3 waste outlets. IMO this is much better, although the pipework is more complicated.

Spruce