Clean It Up

UK Window Cleaning Forum => Window Cleaning Forum => Topic started by: concept on July 23, 2009, 11:12:08 am

Title: tds of 65 after ro
Post by: concept on July 23, 2009, 11:12:08 am

right, this is now absolutely doing my head in here.

my tds crept up a bit, and was advised to buy new filters for my merlin, which i have done, at great expense...

checked the tds after the merlin, and after an hour or so, it was 75.

was advised to move the system to as close to the mains outside tap as possible, which i have done, so there is now about a foot from tap.

production up to 1l per minute, however tds after ro is now 65.

at this rate, it will eat its way through my 6.5l di vessels resin at a rate of 1500 litres per refill of resin!!

absolutely pulling my hair out here....help please!!

Title: Re: tds of 65 after ro
Post by: GWCS on July 23, 2009, 11:20:30 am

Whats is your TDS of your water supply?

and your water supply pressure (PSI) ?

Title: Re: tds of 65 after ro
Post by: concept on July 23, 2009, 11:31:06 am

need to go b+q or somewhere now to grab a pressure tester, tds is 320 at source.

Title: Re: tds of 65 after ro
Post by: bad trippy on July 23, 2009, 11:45:11 am

have you given it a good flush?

Title: Re: tds of 65 after ro
Post by: concept on July 23, 2009, 11:47:04 am

been on for over an hour and a half.

absolutely at my wits end, as even after the di it is now 34-36.

at the start of the week i was producing 0!!!!!!

 >:( >:( >:( >:(

not what i needed this at all.

Title: Re: tds of 65 after ro
Post by: Craig 72 on July 23, 2009, 12:16:24 pm

I'm in a similar boat,although not quite as bad.Got a 300 gpd RO about 3 months ago and only window clean one day a week.The tds reading after RO when it was brand new was 35 odd which even then I thought quite high.Now its crept up to high 50s despite regularly flushing.Surely I don't need new filters or membranes already at so little use.Tds straight from tap is 330 odd.The pressure seems good although I don't know exactly what it is.I'm going through resin seriously quickly in my DI.

Title: Re: tds of 65 after ro
Post by: mark dew on July 23, 2009, 01:01:58 pm

Quote from: concept on July 23, 2009, 11:47:04 am

been on for over an hour and a half.

absolutely at my wits end, as even after the di it is now 34-36.

at the start of the week i was producing 0!!!!!!

 >:( >:( >:( >:(

not what i needed this at all.

After changing the filters did you produce water for an hour then throw it away?
It is different from maintenance flushing.

Title: Re: tds of 65 after ro
Post by: mark dew on July 23, 2009, 01:04:26 pm

If all the above has been done you will need to replace the membranes.

Title: Re: tds of 65 after ro
Post by: concept on July 23, 2009, 02:00:40 pm

replaced membranes and been running it for 4 hours now, still nothing.

surely the tap pressure doesn't make enough of a difference?!

still getting 65-69 reading after ro.

Title: Re: tds of 65 after ro
Post by: Steve CM on July 23, 2009, 02:06:52 pm

you could bring it up and i'll take a look at it and you can fill your van tank up while your at it ;)

Title: Re: tds of 65 after ro
Post by: concept on July 23, 2009, 02:23:00 pm

you in now steve?

swear to god, i am going to kill something soon, just broke the outdoor tap....hahaha!!

Title: Re: tds of 65 after ro
Post by: mark dew on July 23, 2009, 03:28:28 pm

Quote from: concept on July 23, 2009, 02:00:40 pm

surely the tap pressure doesn't make enough of a difference?!

Unfortunately it makes a huge difference.

Title: Re: tds of 65 after ro
Post by: Steve CM on July 23, 2009, 04:12:29 pm

its not his tap pressure. never dealt with a merlin and i don't want to again ;D why can you adjust the pure/waste ratio?

Title: Re: tds of 65 after ro
Post by: concept on July 23, 2009, 04:34:18 pm

bring on the 4040!!

as soon as i get myself sorted, a 4040 and carbon pole shall be mine. 8)