When to change RO filters?

[Aquattro]

Originally Posted by KevinK

I have never dun a back flush, how do you do that even ?

I have a aquasavecanada.com unit

My unit has a bypass valve for flushing. I flushed my old membrane about every blue moon. Japarto was laughing at me when I complained about lack of output. So he gave me a new membrane, I took the old one out and opened it. Just disgusting. Most of it was plugged with brown sludge. The new membrane gives me about 40% more output now, and I flush it once a week, minimum. I should have taken a pic of it...