[Michael Peterson]

hi, I have just been buying some prefilters and noticed that gardiners doesn't sell them anymore are people still using Fiberdyne? is so where from I have 2 x 10 inch prefilters before my 4040 .
also whats the current opinion on flushing ? are we doing it or is it pointless :-)

[Spruce]

hi, I have just been buying some prefilters and noticed that gardiners doesn't sell them anymore are people still using Fiberdyne? is so where from I have 2 x 10 inch prefilters before my 4040 .
also whats the current opinion on flushing ? are we doing it or is it pointless :-)

Fiberdyne filters from daqua, gaps water or grippatank.
I don't flush that often but our water doesn't have much calcium in it. If the water is harder where you live then its advisable to flush more regularly.
What I'm doing works for me as my 4040 membrane is 7 years old and still performing at 97% efficiency. My previous 450gpd membranes lasted 6 years.
I do stick to the change cycle of my fiberdyne filters. I have 20" prefilters and change then at 77k of water usage.

First filter is a sediment filter and the second a Fiberdyne carbon block.

This last time I took the old fiberdyne out and fitted it in the place of the sediment filter and then put the new fiberdyne filter as the second filter as normal. It's working fine so far but we haven't used much water of late.

[Dry Clean]

I cant believe there are people still buying Fiberdyne filters, talk about spending a pound to save a penny.

[Simon Trapani]

Why do you say that? Genuinely interested.

I switched to fibredyne 10” some years back mainly for less maintenance & less loss of pressure. But I was thinking of going back to separate carbon & sediment filters as I was beginning to wonder whether the fibredynes were worth the extra money.

[Simon Trapani]

To original OP, I only flush for a couple of minutes after a softener regen or filter change.

You should have enough waste flow over your membrane to keep it clean without really the need to flush.

[Spruce]

Why do you say that? Genuinely interested.

I switched to fibredyne 10” some years back mainly for less maintenance & less loss of pressure. But I was thinking of going back to separate carbon & sediment filters as I was beginning to wonder whether the fibredynes were worth the extra money.

Dry Clean has always advised about carbon filter change and wasting money on Fiberdyne prefilters.

He must be in the ideal place where he has very little residual chlorine in his water.  From memory I seem to remember he changes his carbon block every 6 months or is it a year.

Doug from Daqua recently reported that there are places in Scotland where there is virtually no trace of chlorine in the water. In that case buying an expensive Fiberdyne would be money wasted.

The very first r/o I bought was 1 year old. The window cleaner I bought it from didn't replace prefilters once in that year. Those membranes were already shot when I bought the system and had to replace the membranes shortly after purchase. We seem to get days when our water supply reeks of chlorine. Our water authority draws water from many different local sources as well as Kielder dam in the Scottish boarders, so I guess chlorine content depends on where water is drawn from.

If I had to replace my 4040 membrane once a year because I didn't replace the Fiberdyne filter 3 times I would be out of pocket but I can see that Dry Cleans experience tells him a different story to mine.

[chez]

I went through a period where I was having to replace the r/o every two years. Once it was knackered in a year and a half. Then I switched to a fiberdyne filter and now this r/o membrane is nearly 5 years old and no sign of it failing. In my area the TDS of the water fluctuates throughout the year. In the winter, when it’s raining a lot  it can drop to 230 ppm. But at the moment it’s 440 ppm. It’s coming out of the r/o at 20. 
I change the fiberdyne about every 4 months. I can usually tell when it needs changing as the pressure drops so it must get clogged. During one period of time the filter was only about 2 months old and I just couldn’t get the R/o to function properly, water pressure was awful so I thought r/o was knackered. So I opened up the filter casing and it was filthy and clogged. There must have been some really dirty water that went through it. Changed the filter and it ran perfectly so the fiberdyne did it’s job perfectly.  For what £11 per filter, and does a really good job, I’ll stick with them. Hope this helps

[Ooooooog]

It s not really about how long it lasts, but how much water is put through it.
I flush mine about once a month. Every 30,000 (of pure) ((at 2:1)) litres. Ish.

[Dry Clean]

I went through a period where I was having to replace the r/o every two years. Once it was knackered in a year and a half. Then I switched to a fiberdyne filter and now this r/o membrane is nearly 5 years old and no sign of it failing. In my area the TDS of the water fluctuates throughout the year. In the winter, when it’s raining a lot  it can drop to 230 ppm. But at the moment it’s 440 ppm. It’s coming out of the r/o at 20. 
I change the fiberdyne about every 4 months. I can usually tell when it needs changing as the pressure drops so it must get clogged. During one period of time the filter was only about 2 months old and I just couldn’t get the R/o to function properly, water pressure was awful so I thought r/o was knackered. So I opened up the filter casing and it was filthy and clogged. There must have been some really dirty water that went through it. Changed the filter and it ran perfectly so the fiberdyne did it’s job perfectly.  For what £11 per filter, and does a really good job, I’ll stick with them. Hope this helps

Where are you getting a Fibredyne for £11 ?

[Dry Clean]

It s not really about how long it lasts, but how much water is put through it.
I flush mine about once a month. Every 30,000 (of pure) ((at 2:1)) litres. Ish.

Its actually about how much carbon is in the filter that counts, a £30 Fibredyne has the same weight in carbon as the ones I buy at a tenner, that said the one at a tenner doesn't have a fancy name and isn't wrapped in paper. lol

[Dry Clean]

Why do you say that? Genuinely interested.

I switched to fibredyne 10” some years back mainly for less maintenance & less loss of pressure. But I was thinking of going back to separate carbon & sediment filters as I was beginning to wonder whether the fibredynes were worth the extra money.

Ask yourself this question, if the cheaper carbon filters have the same weight/amount  in carbon as the Fibredyne how come they have a shorter lifespan ? the truth is they don't, once I realised this I just used my cheaper carbon filters as I would a Fibredyne and cut my expense by 2 thirds.

 

[Simon Trapani]

Thing is I never seem to get a reduction in pressure even after a couple of months or so, so never really know when to change them. And like you say, they're not exactly cheap compared to the separate carbon & sediment. I'm only on my second RO membrane in 10 years or so wfp so it's not like I've been wrecking them either, so hard to tell.

[Spruce]

Why do you say that? Genuinely interested.

I switched to fibredyne 10” some years back mainly for less maintenance & less loss of pressure. But I was thinking of going back to separate carbon & sediment filters as I was beginning to wonder whether the fibredynes were worth the extra money.

Ask yourself this question, if the cheaper carbon filters have the same weight/amount  in carbon as the Fibredyne how come they have a shorter lifespan ? the truth is they don't, once I realised this I just used my cheaper carbon filters as I would a Fibredyne and cut my expense by 2 thirds.

Its the manufacturers of that c/b filter that advise service life. Ive seen a 20" with a 6000 liter service life.

[windowswashed]

Fibredyne filters are the best I've ever used for protecting ro membranes, better than all the others by a long shot!

[chez]

I went through a period where I was having to replace the r/o every two years. Once it was knackered in a year and a half. Then I switched to a fiberdyne filter and now this r/o membrane is nearly 5 years old and no sign of it failing. In my area the TDS of the water fluctuates throughout the year. In the winter, when it’s raining a lot  it can drop to 230 ppm. But at the moment it’s 440 ppm. It’s coming out of the r/o at 20. 
I change the fiberdyne about every 4 months. I can usually tell when it needs changing as the pressure drops so it must get clogged. During one period of time the filter was only about 2 months old and I just couldn’t get the R/o to function properly, water pressure was awful so I thought r/o was knackered. So I opened up the filter casing and it was filthy and clogged. There must have been some really dirty water that went through it. Changed the filter and it ran perfectly so the fiberdyne did it’s job perfectly.  For what £11 per filter, and does a really good job, I’ll stick with them. Hope this helps

Where are you getting a Fibredyne for £11 ?

I bought them in bulk enough to last a few years. Even tho the price has increased since then, I would still pay £15 - 20  for them cos they work well with my system. I only have a space for one filter on my tank. And I live in a highly chlorinated water area which kills the r/o.  To go from having the nightmare situation of a membrane only lasting 1 1/2 years to one lasting 5 years and still going strong -  to replace the filter is quick and easy option for me. £45 per year considering I earn really good money and the confidence that the filter is protecting the membrane.