Bad RO Membrane??

[steveoutlaw]

How can you tell when your RO membrane has gone bad? Mine is probably 2 years old but it's still putting out water like a champ. Should you replace it every couple of years or can you wait until it stops producing water (or drastically slows).

 

Thanks.

[mogurnda]

I usually get 2-3 years out of mine. I have a TDS meter inline between the RO and DI, and know it's time to change it when the TDS starts to rise.

[extreme_tooth_decay]

I am on my 5th year with my current membrane. I do not use DI resin.

 

It is still producing TDS 4 or 5 water. I will replace it when the TDS is above 20.

[DaveS]

When my TDS out of the membrane creeps up, I do a flush for a bit. That usually allows it to drop back down to tolerable levels. When it doesn't come back down, then I'd replace.

[amay121]

I use DI, and when my TDS goes beyond 7 then I replace. Also, I do notice that the DI gets used a lot faster when the membrane is shot.