How long does resin last if using RO?

[keir]

My RO is kicking out 000, but got thinking the other day

What exactly does di do now if the water is 000 going into it? And how long will the resin last and how will i know when its had it?

 

[tench0771]

that is some ro m8 if its proudcing 000ppm u wont need di if thats the case ,out of intrest wat is ur tap tds an wat ro u using ???

 

[Duncs]

you lucky thing must have low tap water readings

 

[Smurf]

Or you are still using the wrong type meter @keir as no ro I know of will produce 000pm straight from tap water

 

[keir]

Nope swapped the EC meter to a tds meter, my own daft fault i didnt spot that tiny detail on the listing.

My tap tds today is



And my ibc is reading



Last winter my tap tds was as low as 034 but over the summer it was upto 096

I was reading up about it this morning, and from what i can tell is that even though the RO is purifying the water the resin

Strips that last tiny bit of minerals and salt out!!!!!?????

The RO i'm using, i dont know what make it is, but it has stainless housing.....hang on i'll stick a picture up so those of you who know more might be able to tell

 

[doug atkinson]

What's your ration pure to waste. Just get a litre jug and time it.

 

[keir]

I'll check the waste but i know the pure is coming out at a litre every 1:35

 

[doug atkinson]

It looks like a 40/40 you have there. Your pressure must be pretty low to have a litre every 1.35.

A 4021 at good pressure which is smaller membrane kicks out a litre every 25 mins. (That is on our mains though)

If your back pressure isn't set correctly then there is a risk of blowing your membrane so worth checking what your waste is. On the other side if set too low then your pure will be less output.

 

[keir]

Sorry doug.....I meant 1 minute 35 secs, the waste judging by flow rate looks about 50/50 maybe 60 pure 40 waste