RO/DI Readings

[xpirtdesign]

Just bought a 4 stage 100GPD filter. After running about 50 gallons of filtered water, im reading 009 - tested tap water at 365. Am I good to go?

 

[tkeracer619]

Assuming that is after RO but before DI yes, you are good to go! At least in regards to TDS.

I am pretty sure SOCAL uses chloramines in their water. With a 100gpd membrane you are likely going to see chloramine breakthrough. This is toxic to your tank and will cause excessive DI exhaustion as well as damage the membrane.

Confirm your location and that they use chloramines. You will likely want to use specialized carbon blocks at a minimum or ideally put a specialized filter in front of your RODI to protect your system and tank.

Chloramines are a pain in the butt.

 

[mcgyvr]

9 is not 0 so no.. not good to go..

Do you even have a DI stage on that?
Where in the system is the TDS reading being taken from?

 

[tkeracer619]

9 would be roughly 97% rejection. I assume that is before DI.

 

[mcgyvr]

9 would be roughly 97% rejection. I assume that is before DI.

I know you did...and I fully understand what you wrote..

But I was afraid that because you wrote "you are good to go!" that they wouldn't catch onto the part about "before DI" and I fear their TDS reading is post DI stage.. But I'm assuming too...