Clean It Up

UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: WES on August 02, 2012, 09:12:39 pm

Title: tds 320
Post by: WES on August 02, 2012, 09:12:39 pm

320 out of tap, running through pure freedom 300gpd with 10inch di vessel. Can't get it at zero anymore even with new resin.
Out of RO is 52 then through DI coming out around 5. Help please.

Title: Re: tds 320
Post by: steven ainger on August 02, 2012, 09:17:22 pm

How old is the ro

Title: Re: tds 320
Post by: WES on August 02, 2012, 09:19:48 pm

two years.

Title: Re: tds 320
Post by: TomCrowther on August 02, 2012, 09:22:04 pm

5 is fine in normal circumstances.

Title: Re: tds 320
Post by: steven ainger on August 02, 2012, 09:31:22 pm

Have you changed the pre filters lately,
Also whats the water pressure.
What readings were you getting when it was new

Title: Re: tds 320
Post by: WES on August 02, 2012, 09:36:16 pm

Yep pre filters changed. Not sure on pressure but if I turn the tap so its really low pressure the tds reading goes down slightly.

Title: Re: tds 320
Post by: WES on August 02, 2012, 09:38:48 pm

not sure when it was new but tds was zero

Title: Re: tds 320
Post by: Dave Garrett on August 02, 2012, 09:39:47 pm

try backflush for at least 60 mins water pressure on max

Title: Re: tds 320
Post by: Steve Sed on August 02, 2012, 09:42:48 pm

I had to change membranes at 2 years, but I have the 200gpd.

Title: Re: tds 320
Post by: WES on August 02, 2012, 09:44:19 pm

Cheers i'll give it a try. Not sure if I should change membrane

Title: Re: tds 320
Post by: richardlingard on August 03, 2012, 09:34:00 am

id look towards the di vessel because resin should make water of any tds 0

Title: Re: tds 320
Post by: Mist A Bit on August 03, 2012, 12:19:16 pm

i had the same problem, i was using the little 750ml vessel and it stopped working. it was the seal on top of the cartridge inside. If you using that i`d quickly think about getting a bigger vessle say 11ltr

Title: Re: tds 320
Post by: steven ainger on August 03, 2012, 02:13:01 pm

I agree, a larger di would be more user friendly, but its not the problem.
If youve got a tds of 52 coming out if the ro, it means the ro is the problem.
I would buy new good quality membranes, and replace

Title: Re: tds 320
Post by: Afterglow Window Cleaners on August 03, 2012, 03:12:21 pm

I recently was in a similar situation, water was coming from my RO at 49ppm and then using a lot of resin from my small 1 Litre vessel going down to 2-3ppm

I changed the prefilters and the membrane, now my water comes through the RO at 8ppm and the DI gets it down to 0 and uses a lot less resin.

Title: Re: tds 320
Post by: WES on August 03, 2012, 09:08:45 pm

Thanks lads,
Just ordered new everything from pure freedom, hope it does the trick.

Title: Re: tds 320
Post by: weetot on August 03, 2012, 10:49:01 pm

Sorry to add this a little bit late, but it sounds like the RO Membranes may need changing, IMO :-[