About 6 months ago our old RO system membranes died and we had to decide whether to replace the membranes or upgrade to a better system. So we decided on the latter and went for a 4021.
Since upgrading, we have been more attentive to the prefilters, as we don't want to kill this more expensive membrane.
We noticed the filters getting dirty very quickly. The recommendation is to change the sediment filter every 10,000 litres. But even after 3,000 litres, the sediment filters turn really brown. So we're now going through loads of filters. And even had to buy some carbon filters too as these were being contaminated.
We called the waterboard, who were as helpful as a hankie for a scrim. They gave 2 excuses, one was that due to a factory closing down, the water doesn't get flushed as much as it used to. And the 2nd was that there could be a split pipe, and we'd have to wait for them to replace our pipes to plastic ones with no time scale given.
Surely this water is even not even good enough to drink!
So we're really stuck as to what to do other than replace the sediment filter like every other fill and the carbon filter every 5 fills.
