[combat1]

I have just replaced my 10'' membranes after 2 and a bit years. I flush the system and change the filters, I also have a booster pump.  Don't need to product that much water, about 600 litres a week. Water from tap is around 280 - 300.  Is this about right to change every two years?

[Richard iSparkle]

My concept 2o RO lasted 2 years, but I did freeze it at one point I think!

I believe it depends on your maintenance, and the type of water in your area too

[Smudger]

really depends on your tap TDS - the higher it is the quicker the membrane will clogg up - even with flushing etc..

but you should be getting at least 2 years + from a quality membrane if you are changing the pre-filters esp the carbon
every 6 months minimum.

if your making only 600 ltrs per week is your ro standing around unused for 2 or 3 days a week you may find that unprocessed water sitting in the membrane is ageing it.  at the end of a run you could use 25lts of pure water and
feed it back into the ro before shutdown this means the membrane will sit in pure water when not in use

Darran

[EandM]

I managed 18 months from my Merlin membranes and 24 hours to 6 months from the pre-filter, depending on conditions.

[Smudger]

My merlin membranes lasted just under 3 years

when reading the instruction booklet it's reccomended to place more pre filters before the RO and not rely on
the pre filter in the unit itself

Darran

[Peter Fogwill]

2-3 years, more in a soft water area, less in a really hard water area.

[R.C Property]

my water starts at 450ppm and my 10inch membraines are now 2 years and 3 months old. still going ok.