Can someone do a TDS test on Calgary Tap water?

[Delphinus]

14 hahahaha Did you really need to ASK if your TDS meter was working? My TDS surges to at least 200 or more when I start up a RO/DI fill. Craziness.

On a somewhat related question .. what kind of TDS are Calgarians pulling AFTER their RO? I bought a new membrane recently and it rarely reads under 5. I'm going through DI resin like crazy as a result. My last one seemed to register 0 or 1 way more often and I'm wondering what's more normal. I'm kind of thinking I got a dud membrane or maybe it's a brand or rejection rating kind of thing.

[richtg]

260 in, < 003 out. Queensland

Tony,
Do you flush your membrane? Also, do you have a reservoir tank on your RO/DI? ...and if you run it for a few minutes, then take a sample does it read lower?

[Delphinus]

Yes, I flush it at the beginning of every fill into the reservoir. I don't know if I'm doing this right, but here's what I do: I leave the bypass valve open until the TDS reads <10, it takes quite a few minutes to get down to that level. It might come down to anywhere from 0 to 2, if I wait as long as 10 minutes on the flush, but even then sometimes a couple hours later I'll come check it again and it's bounced back up to 5 or so.

[richtg]

Yes, I flush it at the beginning of every fill into the reservoir. I don't know if I'm doing this right, but here's what I do: I leave the bypass valve open until the TDS reads <10, it takes quite a few minutes to get down to that level. It might come down to anywhere from 0 to 2, if I wait as long as 10 minutes on the flush, but even then sometimes a couple hours later I'll come check it again and it's bounced back up to 5 or so.
__________________
-- Tony

Hmm... I have always given mine about a 20 minute flush every month or so based on instructions from Aquasafe Canada way back...

I would try removing the DI altogether just to see...

[Delphinus]

20 minutes! Ok, I never really knew how long you were supposed to flush it for, I can adjust it to 20 minutes and see how much of a difference it makes. Thanks (and sorry for the hijack there Greg!)

[richtg]

Lemme know if that does anything for you, Tony.

And my apologies as well, Greg!

[digital-audiophile]

No worries! The more information flying out there the better!

[JDigital]

Originally Posted by digital-audiophile

No worries! The more information flying out there the better!

I've got an inline as well, usually reads 150-180 in... 000-002 out.. No DI canister yet.. just RO. NW here.