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billozz

  • Posts: 526
tds reading
« on: January 13, 2009, 04:38:03 pm »
guys i have bought a new r/o and replaced the di resin water in is about 270 water out 11 how can i get it lower or is it about as low as i can expect i am a bit surprised that it is that high with new bits.
also will 11 be ok to clean with
thanks
a lot
bill
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chrisyg

Re: tds reading
« Reply #1 on: January 13, 2009, 04:40:19 pm »
whats your tap tds?

then wats you tds from the ro out before the di?
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billozz

  • Posts: 526
Re: tds reading
« Reply #2 on: January 13, 2009, 05:57:54 pm »
tap tds is 270  not sure of tds before di checking that now, what diff does that make, the r/os are brand new
thanks for the reply
bill
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there are more windows than window cleaners so lets help each other

chrisyg

Re: tds reading
« Reply #3 on: January 13, 2009, 06:13:43 pm »
need to know how your ro is doing before going thru the di. to work anything out you always need to know the minor details - break the things down to find out what not performing (analytically  ::) not breaking up your gear!  :o)

Its easier for others to help then..

Also what RO kit do you have? Whats your tap pressure?
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billozz

  • Posts: 526
Re: tds reading
« Reply #4 on: January 13, 2009, 09:47:28 pm »
out of r/o is 13 tap pressure aided by a pump is about 70psi
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Peter Fogwill

  • Posts: 1415
Re: tds reading
« Reply #5 on: January 14, 2009, 12:33:27 am »
Quote from: billozz on January 13, 2009, 04:38:03 pm
guys i have bought a new r/o and replaced the di resin water in is about 270 water out 11 how can i get it lower or is it about as low as i can expect i am a bit surprised that it is that high with new bits.
also will 11 be ok to clean with
thanks
a lot
bill

I would say your IN reading is a bit high, but if you changed your DI the water you are using on the window will be 0ppm, so you will not be cleaning with the 11ppm.

You say the reading after RO is 13ppm, and the reading after DI is 11ppm, so your DI is not working properly, or the resin needs changed.

What sort of RO is it the 40"?

Peter
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pitcher

  • Posts: 87
Re: tds reading
« Reply #6 on: January 14, 2009, 07:02:28 pm »
how long has it been running some filter need to be run at half tap presssure for about 2hrs also shake your di pot         friend had this problem with a merlin       if need help u can phone me 07811067614
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craig21t

  • Posts: 132
Re: tds reading
« Reply #7 on: January 14, 2009, 10:47:32 pm »
new ro membranes need time to flush through. most ro's have between 95-98% rejection rate, so take you tap tds reading minus the 95-98% and you should get your output tds of the ro. If the resin you have is new then as stated the tds should be zero, do you have the di canister the wrong way round, as they have an in and an out, getting them wrong would result in the problem you have here. hth,
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