[Carl2009]

Hi all,

Whilst I've been in business for over 6 years, all of it wfp, i'm still on my original 40" RO membrane! It's a Pure Freedom van mount system; post RO and pre-DI I get a TDS of between 1 and 3 ppm. Very good after all these years though I am in a soft water area (i'm guessing this makes it easier on the membrane) and I don't forget to flush regularly. I have some questions though. I am sure my membrane will need replacing soon, so here we go (posted so others can learn as I know I could just call PF or a supplier):

1. What does 4040 mean?
2. I have a 40" Champ housing - what is the recommended replacement membrane for me (I have a booster pump increasing tap pressure from 2 bar to around 8 bar)?
3. What's the difference between HF4 and HF5 etc?
4. Who is the current recommended supplier of membranes?
5. Though I have a booster pump we often lose electricity, so i'd like to be able to fill at 2 bar. Does this affect the recommendation to question 2?
6. Are all 40" membranes suitable for my Champ housing?
7. Has anyone found a fools guide online to RO housings and membranes?

Has anyone any other advice?

Cheers

[Don Kee]

4040 is the size of you housings/membranes

HF4 needs high pressure to work at optimum spec
HF5 can work at a lower in going pressure
(As you have a booster pump, go for the HF4, its slighlty cheaper)

The 3 suppliers most mention are: gaps water,vyair, daqua (i use daqua for anything water purifying related)

Unsure what you mean by losing electricity (Q5)?
Use the booster pump mate. R.O's work best when they have a high ingoing pressure (80-100psi) giving a faster production rate and lower TDS

Q6 - yes

Q7 - search the forum mate, theres loads of info!

Also, although some people(seanK  ) will recommend otherwise, i'd change your pre filters ( depending on how much water you produce) around 3-6 monthly...
It should speed up up production rates, and help protect membranes, although for how long your membrane has lasted you must ne doing something right!!!

[Carl2009]

Hi all,

Whilst I've been in business for over 6 years, all of it wfp, i'm still on my original 40" RO membrane! It's a Pure Freedom van mount system; post RO and pre-DI I get a TDS of between 1 and 3 ppm. Very good after all these years though I am in a soft water area (i'm guessing this makes it easier on the membrane) and I don't forget to flush regularly. I have some questions though. I am sure my membrane will need replacing soon, so here we go (posted so others can learn as I know I could just call PF or a supplier):

1. What does 4040 mean?
2. I have a 40" Champ housing - what is the recommended replacement membrane for me (I have a booster pump increasing tap pressure from 2 bar to around 8 bar)?
3. What's the difference between HF4 and HF5 etc?
4. Who is the current recommended supplier of membranes?
5. Though I have a booster pump we often lose electricity, so i'd like to be able to fill at 2 bar. Does this affect the recommendation to question 2?
6. Are all 40" membranes suitable for my Champ housing?
7. Has anyone found a fools guide online to RO housings and membranes?

Has anyone any other advice?

Cheers

By losing electricity I mean that the booster pump won't work, so I only have tap water mains pressure at 2bar.

Cheers

[chris turner]

Hi all,

Whilst I've been in business for over 6 years, all of it wfp, i'm still on my original 40" RO membrane! It's a Pure Freedom van mount system; post RO and pre-DI I get a TDS of between 1 and 3 ppm. Very good after all these years though I am in a soft water area (i'm guessing this makes it easier on the membrane) and I don't forget to flush regularly. I have some questions though. I am sure my membrane will need replacing soon, so here we go (posted so others can learn as I know I could just call PF or a supplier):

1. What does 4040 mean?
2. I have a 40" Champ housing - what is the recommended replacement membrane for me (I have a booster pump increasing tap pressure from 2 bar to around 8 bar)?
3. What's the difference between HF4 and HF5 etc?
4. Who is the current recommended supplier of membranes?
5. Though I have a booster pump we often lose electricity, so i'd like to be able to fill at 2 bar. Does this affect the recommendation to question 2?
6. Are all 40" membranes suitable for my Champ housing?
7. Has anyone found a fools guide online to RO housings and membranes?

Has anyone any other advice?

Cheers

By losing electricity I mean that the booster pump won't work, so I only have tap water mains pressure at 2bar.

Cheers

Do you mean the booster pump switches on/off in cycles?

[Spruce]

Hi all,

Whilst I've been in business for over 6 years, all of it wfp, i'm still on my original 40" RO membrane! It's a Pure Freedom van mount system; post RO and pre-DI I get a TDS of between 1 and 3 ppm. Very good after all these years though I am in a soft water area (i'm guessing this makes it easier on the membrane) and I don't forget to flush regularly. I have some questions though. I am sure my membrane will need replacing soon, so here we go (posted so others can learn as I know I could just call PF or a supplier):
My first bit of advise is not to try and fix what isn't broken. Stick with what's working for you.

1. What does 4040 mean?
2. I have a 40" Champ housing - what is the recommended replacement membrane for me (I have a booster pump increasing tap pressure from 2 bar to around 8 bar)?
3. What's the difference between HF4 and HF5 etc?

 According to PF (I phoned them a few years ago) the HF5 performs slightly better with  water pressure below 40psi. Anything above that they would recommend the HF4 because its cheaper. I have an HF5 membrane in my r/o as our water pressure was 40 psi when I bought the system. Since then the water board have increased the pressure to 50psi which it is at the moment. I currently produce water at about 2 liters of pure to 2 liters of waste per minute. That's fine for me, but boosting my water pressure should improve that to more than 50% in the worse case scenario I'm told. However, the HF5 specs tell me that an HF5 will also work with your boosted pressure. PF have a big price difference between the HF4 and HF5 so they will go the HF4 route on higher water pressures.

But at 2 bar I think you will start to suffer with membrane performance and it certain won't work as efficiently at those low water pressures. You would help yourself if you did some experiments with your current r/o with and without the booster pump.

What are the tds readings after r/o  when operated on both boosted and then non boosted modes? What is the difference in performance between boosted and non boosted modes? How quickly do you need to fill your tank?

4. Who is the current recommended supplier of membranes?

PF, Daqua, Gaps Water

5. Though I have a booster pump we often lose electricity, so i'd like to be able to fill at 2 bar. Does this affect the recommendation to question 2?

According to PF, yes. An HF4 will not work properly at those low pressures. An HF5 will be better but the performance will still be compromised.

6. Are all 40" membranes suitable for my Champ housing?

As far as I'm aware yes.

7. Has anyone found a fools guide online to RO housings and membranes?

Don't change what you are doing now. That old saying - "don't fix what ain't broke" comes to mind.

Has anyone any other advice?

Cheers

Most of your questions would be answered on Axeon's website

http://www.axeonwater.com/AXEON-HF5-Series-Ultra-Low-Energy.html

[SeanK]

Just to be clear Don, I have never recommended that people shouldn't change their pre filters, what I have always
stated is to make sure your not spending more than the price of an RO membrane protecting it.
In other words don't be spending a pound to save yourself a penny, take the op's R.O. for example if he had been using the
more expensive pre filters plus changing them at the recommended usage levels then he could have easily spent £500 or
more protecting the membrane he has now.
That's the price of two new 4040 membranes.

[Carl2009]

Just to clarify i'm not thinking of changing yet. I like to have spare everything and I generally do - even a spare pump. I don't have a spare membrane.

I change both pre-filters every 3 months. I use the cheapo ones that are under £20 a time.

I will do a bit of digging and read up.

Cheers all.