Trying to trouble shoot this rodi system

[christwendt]

Is it normal for my resin to turn this amount of orange after only making 10 gallons rodi ? It says it’s coming “in” at 9 and out zero. I had troubles in the past with super high tds tap but I think it’s fixed due to fixing water softener built into the house. Is this okay numbers? I just am worried I’m going through my resin fast as it’s already turning orange after 10 gallons. I just replaced the resin tonight only made 10 gallons.

 

[Brett S]

It doesn’t seem unreasonable, assuming you’re talking about just the little bit on the bottom turning orange and not the whole cartridge. If the whole cartridge is exhausted after 10 gallons then something is definitely wrong.

Also, it’s worth noting that each time you run the RODI filter the first gallon or two of water coming from the RO membrane will be unusually high in TDS due to TDS creep. If you run the filter frequently to make small quantities of water this effect can be magnified and can burn through resin pretty quickly. It’s best to run the filter less frequently and make larger quantities of water at once. You can also mitigate this by discarding the first gallon or two of water after the RO membrane and before the DI filter each time you Run the filter.

 

[laverda]

You may have high CO2 levels in your water. Take a sample after you membrane and measure the PH. then aerate it thourghly for and hour or more and measure the PH again. If the PH jumps up you have high CO2, which will use up you DI resin very quickly.
I used to get thousands of gallons out of my DI at my old house. Here I am lucky to get 800 gallons out of dual DI canister.

 

[eag]

It says it’s coming “in” at 9

Hmm that's pretty low. I don't know anything about water softening systems, but my first thought was maybe this number is off.

high CO2, which will use up you DI resin very quickly.

Interesting! I did not know this

 

[christwendt]

It doesn’t seem unreasonable, assuming you’re talking about just the little bit on the bottom turning orange and not the whole cartridge. If the whole cartridge is exhausted after 10 gallons then something is definitely wrong.

Also, it’s worth noting that each time you run the RODI filter the first gallon or two of water coming from the RO membrane will be unusually high in TDS due to TDS creep. If you run the filter frequently to make small quantities of water this effect can be magnified and can burn through resin pretty quickly. It’s best to run the filter less frequently and make larger quantities of water at once. You can also mitigate this by discarding the first gallon or two of water after the RO membrane and before the DI filter each time you Run the filter.

That makes sense about your last point on tds creep. I’ve been reading about that as I’ve been trying to trouble shoot. When you mean discarding the first gallon or two of water after the RO and before the di filter how do I do that ? I have two other valves attached. Do you mean the black valve that’s used to flush my ro membrane? I always run that for 5 mins before making my water as I notice my in tds reading goes from 200s down to 9 then I start making rodi water by switching that valve back which increases psi back to 60 and makes rodi. Is that what you mean ?

 

[christwendt]

You may have high CO2 levels in your water. Take a sample after you membrane and measure the PH. then aerate it thourghly for and hour or more and measure the PH again. If the PH jumps up you have high CO2, which will use up you DI resin very quickly.
I used to get thousands of gallons out of my DI at my old house. Here I am lucky to get 800 gallons out of dual DI canister.

Interesting in going to check this. I just moved into this house and burning through resin trying to figure out why. Maybe it’s fixed as our softener for fixed. The other guy said the small amount of orange on bottom doesn’t mean it’s getting exhausted quick.

 

[christwendt]

Hmm that's pretty low. I don't know anything about water softening systems, but my first thought was maybe this number is off.



Interesting! I did not know this

My tap is not 9. I think it’s coming out of ro membrane at 9 and out di at 0. My tds pen to test tap is dead.