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8 weekly

  • Posts: 2258
4040 membrane limescale
« on: July 12, 2018, 03:56:55 pm »
I've just changed a membrane after 8 months. I guess we've used 1,200 litres a day on average over the period.  I've changed the two prefilters perhaps 5 or 6 times but the membrane is coated in what I take to be limescale. Anyone have any ideas?

p1w1

  • Posts: 3407
Re: 4040 membrane limescale
« Reply #1 on: July 12, 2018, 05:28:56 pm »
sounds like the membrane is doing its job..

8 weekly

  • Posts: 2258
Re: 4040 membrane limescale
« Reply #2 on: July 12, 2018, 06:04:56 pm »
sounds like the membrane is doing its job..
Never thought of that.  :-[

CleanClear

  • Posts: 5799
Re: 4040 membrane limescale
« Reply #3 on: July 12, 2018, 07:15:31 pm »
Consider using a softener....................

http://www.ionicsystems.com/uk/product/wall-mounted-softener/

Go

Re: 4040 membrane limescale
« Reply #4 on: July 12, 2018, 08:25:11 pm »
How come you change the filters so infrequently?

8 weekly

  • Posts: 2258
Re: 4040 membrane limescale
« Reply #5 on: July 13, 2018, 05:42:03 am »
How come you change the filters so infrequently?
What is the correct frequency?

Go

Re: 4040 membrane limescale
« Reply #6 on: July 13, 2018, 07:49:59 pm »
Depends on the breed of filter. Many are 10,000 litres. Thatís going into the membrane.

8 weekly

  • Posts: 2258
Re: 4040 membrane limescale
« Reply #7 on: July 13, 2018, 07:53:03 pm »
Depends on the breed of filter. Many are 10,000 litres. Thatís going into the membrane.
Seriously? That's a new set every few days.

CleanClear

  • Posts: 5799
Re: 4040 membrane limescale
« Reply #8 on: July 13, 2018, 08:52:44 pm »
Hope i'm not telling me granny how to suck eggs here........ but Gardiners fibredyne filters change colour when you need to change them ?

CleanClear

  • Posts: 5799
Re: 4040 membrane limescale
« Reply #9 on: July 13, 2018, 08:54:01 pm »
Depends on the breed of filter. Many are 10,000 litres. Thatís going into the membrane.
Seriously? That's a new set every few days.
I think he's right, check out the literature for many of the filters. Even if he's wrong he aint that far out........

Simon Trapani

  • Posts: 479
Re: 4040 membrane limescale
« Reply #10 on: July 13, 2018, 08:56:59 pm »
Hope i'm not telling me granny how to suck eggs here........ but Gardiners fibredyne filters change colour when you need to change them ?
Do they? I've never noticed. I'll buy a clear housing if they do.

Don Kee

  • Posts: 3518
Re: 4040 membrane limescale
« Reply #11 on: July 13, 2018, 08:59:54 pm »
Mine says 38,000 litres prefilter change (from Daqua)

CleanClear

  • Posts: 5799
Re: 4040 membrane limescale
« Reply #12 on: July 13, 2018, 09:01:19 pm »
Hope i'm not telling me granny how to suck eggs here........ but Gardiners fibredyne filters change colour when you need to change them ?
Do they? I've never noticed. I'll buy a clear housing if they do.

Hold on, i may be wrong !!!!!!

Go

Re: 4040 membrane limescale
« Reply #13 on: July 14, 2018, 05:51:30 am »
My sediment filter is a different colour when it needs changing 😀😀

8 weekly

  • Posts: 2258
Re: 4040 membrane limescale
« Reply #14 on: July 14, 2018, 06:05:08 am »
I'm going to change them fortnightly going forward then I think.

Walter Mitty

  • Posts: 1254
Re: 4040 membrane limescale
« Reply #15 on: July 14, 2018, 06:23:36 am »
I've just changed a membrane after 8 months. I guess we've used 1,200 litres a day on average over the period.  I've changed the two prefilters perhaps 5 or 6 times but the membrane is coated in what I take to be limescale. Anyone have any ideas?

It sounds like something is up.
Although my water usage is about one third of yours, my 4040 has been in about nine years now.  It is showing signs of wear but is still serviceable (now an output TDS of 020 from tap water of 200, and production is lower too).  I change my 20" pre-filters 2-3 times per year.

Spruce

  • Posts: 6600
Re: 4040 membrane limescale
« Reply #16 on: July 14, 2018, 07:46:01 am »
Hope i'm not telling me granny how to suck eggs here........ but Gardiners fibredyne filters change colour when you need to change them ?

If you are just using the Fiberdyne as a single filter (no sediment filter) then the Fiberdyne will be trapping sediment particles bigger than 5 micron. The change of colour is the sediment from the water.

I have to use a sediment filter as our water is terrible sometimes. The sediment filter is red with sediment but the Fiberdyne is clean right to the end before replacement time.
The fiberdyne filter is also 5 micron, so particles smaller than 5 micron will pass through the sediment and the Fiberdyne filter.

.
You canít negotiate with gravity

The older I get the better I was ;)

Go

Re: 4040 membrane limescale
« Reply #17 on: July 14, 2018, 10:29:45 am »
I'm going to change them fortnightly going forward then I think.

I buy them by the box.

However, if youíre using 6000 litres of water a week, then a couple of hundred quid on a membrane twice a year, is no big shakes innit.

8 weekly

  • Posts: 2258
Re: 4040 membrane limescale
« Reply #18 on: July 14, 2018, 01:05:18 pm »
I'm going to change them fortnightly going forward then I think.

I buy them by the box.

However, if youíre using 6000 litres of water a week, then a couple of hundred quid on a membrane twice a year, is no big shakes innit.
And actually might be cheaper to replace a membrane once every 10 months than changing filters fortnightly. I find changing the membrane stressful though as the first time it was a nightmare. This was my third change though and relatively smooth.