TDS Readings

Matt_b · 02-24-2006, 12:26 PM

Finally got myself a 50gpd 4 stage Ro-di unit after 7 mths of buying water

Jeez its slow!! I'm only just in the feed pressure requirements at 50psi and my water temp. is 48 degrees , going by the conversion chart i'm getting about 38 gpd

I also got a handheld tds meter and checked my tap/ lfs water that i was buying.
My tap water came out at 390ppm and my lfs water at 8ppm

Obviously zero is the key figure here but whats acceptable?? is 8ppm too much and should my 4 stage ro-di unit give better results? i've got to dump the first 5 gallons so not tested yet.

Matt

Tim224DT · 02-24-2006, 12:44 PM

The RO/DI unit should come out at 0ppm personaly i think anything over 0ppm is to high. Who makes your RO/DI?

Tim

Matt_b · 02-24-2006, 12:52 PM

Quote:

Originally Posted by Tim224DT

The RO/DI unit should come out at 0ppm personaly i think anything over 0ppm is to high. Who makes your RO/DI?

Tim

My unit's from a UK company, one of the best apparently

Like i said i've still not tested my ro-di water as i've got to trash the first 5 gallons, something to do with cleaning the liquid that the ro filter was packaged with

I just wondered what the tds should be, my tap water is 390, my lfs ro was 8, lets hope i can get zero

Tim224DT · 02-24-2006, 12:55 PM

Yeah i had to trash like the first 5 gallons also......Your unit should read 0

Tim

Matt_b · 02-24-2006, 01:00 PM

Quote:

Originally Posted by Tim224DT

Yeah i had to trash like the first 5 gallons also......Your unit should read 0

Tim

Just out of interest what tds readings do you get in the states with tap?? i live on the outskirts of london and getting 390ppm, that don't sound too good

EDIT tap = faucet hahaha

titanfan · 02-24-2006, 01:02 PM

Wow your tap water is horrid. Mine is 180 TDS. When I first got my filter it was slow then the speed picked up after the membrane and filters were fully saturated. Mine is still abit slow but I am only reading 30PSI plus it is cold. Do you have away to test the filtered water after the membrane (before the DI). After my membrane my water tests at 8TDS. The DI takes it down to 0. The highest I would want to put in my tank is 3TDS at a very max but, I spoil my tank.

Tim224DT · 02-24-2006, 01:02 PM

Mine happens to be 180ish.....Others get like 60 and so on. Its hard to say.

Tim

wharyat · 02-24-2006, 01:04 PM

I get 135.

My filtered water is 0ppm; I let it go up to 3ppm before I replace the DI cartridge.

Matt_b · 02-24-2006, 01:16 PM

Quote:

Originally Posted by titanfan

Do you have away to test the filtered water after the membrane (before the DI). After my membrane my water tests at 8TDS. The DI takes it down to 0. The highest I would want to put in my tank is 3TDS at a very max but, I spoil my tank.

Yeah there is a way as for the first 5 gallons i've got to run that without the di unit connected, i'll let you know the results of before and after

My water must be bad if you guys get high 100's !! just as well i buy my drinking water

Twitterbait · 02-24-2006, 01:52 PM

if your TDS doesn't go down after running it for a day or so then you may need to re-check the seal of the RO cartridge. if they don't seal right then you will get some tap water coming through.

Matt_b · 02-24-2006, 02:09 PM

Quote:

Originally Posted by Twitterbait

if your TDS doesn't go down after running it for a day or so then you may need to re-check the seal of the RO cartridge. if they don't seal right then you will get some tap water coming through.

Thanks Twitterbait, if i get any problems that'll be the first thing i check

Matt

Matt_b · 02-24-2006, 06:27 PM

Is this how american setups look?? kinda tight over here in the uk!!!

ChrisPrusha · 02-24-2006, 06:33 PM

Looking good!!

Matt_b · 02-25-2006, 09:56 AM

Zero reading for tds, looks like my ro-di filter is working

Matt_b · 02-26-2006, 02:01 PM

Quote:

Originally Posted by titanfan

Wow your tap water is horrid. Mine is 180 TDS. When I first got my filter it was slow then the speed picked up after the membrane and filters were fully saturated. Mine is still abit slow but I am only reading 30PSI plus it is cold. Do you have away to test the filtered water after the membrane (before the DI). After my membrane my water tests at 8TDS. The DI takes it down to 0. The highest I would want to put in my tank is 3TDS at a very max but, I spoil my tank.

Ro-Di unit running for a couple of days now and heres the readings -

Feed water - 390ppm TDS
After Ro filter(before Di) - 11ppm TDS
After Ro-Di - 0ppm TDS

Glad i invested a few more ££ with a Di unit

MAtt