Burning through resin? Low TDS in to it.

[PotatoPig]

have a 5 stage BRS RODI system, with a TDS meter between the membrane and resin.

TDS into the resin is in the region of 3-5, but I’m burning through a full resin load in ~300 gallons. Even after a recent full change of all filter blocks. Which is insane.

Any ideas what might be causing this?

 

[EeyoreIsMySpiritAnimal]

Are you on well water?

 

[PotatoPig]

Are you on well water?

Town water.

System has chloramines in it, but the resin is getting nuked even after a full filter block change.

 

[EeyoreIsMySpiritAnimal]

Town water.

System has chloramines in it, but the resin is getting nuked even after a full filter block change.

I asked because well water can have high CO2 levels which can deplete the resin.

You might need to get a water report from your municipality or have an ICP test done to see what's in your water that might be causing the problem. I know some use separate anion and cation canisters instead of a mixed bed so they only have to replace the one that's being used up...

 

[EeyoreIsMySpiritAnimal]

@Buckeye Hydro might have better advice

 

[Buckeye Hydro]

Did you used to get a longer life from your resin?

Do you have your system set up such that it short cycles?

 

[PotatoPig]

It definitely seems to be getting worse.

The lifetime of it also seems to take a hit when I use it intermittently - eg 5 gallons at a time. Feels like the water sitting in the system is causing an outsize drain on it somehow.