TDS meter on my RODI

[NjOyRiD]

i'd like to know if I isntalled my tds meter at the right spot
check my video

its reading .21 ppm
thanx for the help

[RossW]

It looks like you have it on your in/tap and out.  I am not sure where you measured 21.

IMHO, it is interetsing to know what your water is coming in at from your tap but I prefer to know what it is going into my DI resin, after the RO, and what is after the DI resin.

Ratio between tap and after RO should be somewhere close to 97% I think.  This will tell you when your RO membrane(s) are spent and need replacing.

Coming out of your DI resin should be < 2.  If it is >2 I would change my DI resin.

In my case, I am about 520 from the tap, and then 9'sh into my DI resin, and <2 coming out.  I go through DI resin at an amazing rate!

[JD]

I agree with RossW, put your "in" sensor just after your membrane. Having it there will tell you how the membrane is doing.

My TDS coming in is 350 ish and about 6 to the DI. I go through a DI cartridge about every 200g. Come warmer weather I plan on trying to regen the spent resin.

[RossW]

I am anxiuos to hear how this goes.  It is something I have considered but never done.

Come warmer weather I plan on trying to regen the spent resin.