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DI resin longevity

newfly

newfly

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I have the BRS DI canister. I estimate I made 300-400g of water before the TDS went from 0 to 1.

my RO output have ~12 tds.

Is the DI life span looks reasonable? If not, then likely the tds creep is using up the resin.
 
That sounds reasonable to me. I typically let my tds go up to about 5 before I’d change mine.
Do you make large batches at a time? I would let my RO run a couple mins before sending it through the DI. It helped a lot. I would get tds in the hundreds the first couple seconds.
 
Flagg37 said:
That sounds reasonable to me. I typically let my tds go up to about 5 before I’d change mine.
Do you make large batches at a time? I would let my RO run a couple mins before sending it through the DI. It helped a lot. I would get tds in the hundreds the first couple seconds.
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Yes, I let the first cup or two drain before going to the DI. I make 8g batch at a time for water change and 3-4g at a time for top off.
 
Your water is crap out of the tap. Got to love Santa Clara County. At my house with all new (last 5 years) copper pipes I'm getting 450+ tds out of the tap. I burn through that di resin like nothing.
 
My water is ~200 to the RO and 12 to 15 out of the R0 stage . I have a whole whole filter (aquasana rhino) which does a very good job removing chorine. Didn’t really test the incoming water tds.
 
newfly said:
My water is ~200 to the RO and 12 to 15 out of the R0 stage . I have a whole whole filter (aquasana rhino) which does a very good job removing chorine. Didn’t really test the incoming water tds.
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That doesn’t seem right to me. I would expect about 5 out of the ro membrane if it’s 200 going in.
 
newfly said:
My water is ~200 to the RO and 12 to 15 out of the R0 stage . I have a whole whole filter (aquasana rhino) which does a very good job removing chorine. Didn’t really test the incoming water tds.
Click to expand...
What's your pressure going into your membrane? It might be a bit low.
 
Srt4eric said:
What's your pressure going into your membrane? It might be a bit low.
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Didn’t really measure. The ro have a build in pump. I’m getting close to the rated output @400gpd . I assume the pressure is ok.

maybe just a cheap membrane? The tds have been the same since day 1.
 
Nevermind folks, maybe the cheap handheld tds meter is not accurate. I measure again and the incoming water is indeed 400.
 
Without my booster pump I have 60psi going in. Booster pump on its 90psi. I'm a little scared to run the booster pump honestly.
 
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