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UK Window Cleaning Forum => Frequently Asked Questions & Useful Resources => Topic started by: cleantech-westmids on February 01, 2015, 03:09:43 pm

Title: TDS at 70 through RO?
Post by: cleantech-westmids on February 01, 2015, 03:09:43 pm

Hi Guys. I hope all aren't suffering to much outside with the current weather. I'm in need of a litle advise please.

I have a 650litre hot water concept 2o system. I have had my RO for about 2 1/2 years now. Lately though I seem to be going through resin like the clappers (every 4-6-weeks - 11litre di vessel) My tds from tap comes in at around 250. Today I flushed and back flushed the system for around 30 mins each. My tds now comes in at around 70 through the RO before Di.

Am I assuming my RO membrane is buggered and needs changing? :-[  I know I'm probably going over old ground but, it's driving me mad!

Many thanks in advance for anyone that replies.

Cheers guys!

Craig

Title: Re: TDS at 70 through RO?
Post by: cleantech-westmids on February 01, 2015, 10:21:54 pm

C'mon guys can you help me out please?

Cheers

Craig

Title: Re: TDS at 70 through RO?
Post by: Don Kee on February 04, 2015, 09:23:44 pm

If you've never changed your pre filters or membranes in 2 1/2 years, its pretty much a banker that they want changing mate


(You may be better off posting your questions in the main window cleaning section btw)

Title: Re: TDS at 70 through RO?
Post by: cleantech-westmids on February 05, 2015, 09:56:02 pm

Thanks Don. I change my pre filters regular. From RO it still comes out at 70

Title: Re: TDS at 70 through RO?
Post by: clarkson on February 19, 2015, 02:44:16 pm

Hi
70 is quite high and 2.5 years is about the lifespan with regular use.

Tried adjusting your waste I assume?

Mine runs at 14 , with 350 going in.

John