[Spruce]

I have just got one of those new 20" carbon fibre filters from Gardiners. According to Gardiners website, it is effective for 115,000 litres of water.

I would have absolutely no clue as to when that volume of water would have past through the filter, although I would probably guess that it would be blocked up before then with the amount of dirt we get in the water.

I was thinking of a digital countdown flow meter.

http://www.ebay.co.uk/itm/111062254826?_trksid=p5197.c0.m619#ht_2880wt_1399

From what I can see, one would initially set it to 115000 (if it goes up that high) and it counts down until zero when its time to change the filter.

Has anyone else done this for this reason or is it a little OTT?

There are 3 of us drawing water and I have no idea how much is being used TBH.

If one of the lads fills up after I have gone out, then the IBC tank will be full and the r/o switched off before I get back in the afternoon, so I probably won't even know if he has collected water or not.

[Ian Lancaster]

I take it your supply isn't metered then?

[Spruce]

I take it your supply isn't metered then?

No 

[Spruce]

So I take it that no one knows exactly how many litres of water their R/O has used before the carbon block filters need to be replaced.

I find this quite interesting as we are told that the C/B filter has a limited life and when it fails our expensive membranes are put at risk as chlorine destroys membranes. I have always just replaced my filters every few months and haven't had a problem.

Does this mean that we are over stating the effect of chlorine damaging our membranes as nearly all of us don't appear to have too much of an issue with premature membrane failure?