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New HF5 4040 Membrane

Matty H

Member
Messages
788
Has anybody ever replaced theirs? I replaced mine at the weekend as it was 4 years old and the readings were creeping up weekly and had to keep flushing it but didn't make any difference...

So, in goes my new one and the readings are high 25 - 30 /emoticons/sad.png

Somebody said it takes a couple of weeks to get the readings down due to an antibacterial agent they put on in manufacture?

I have flushed it twice - and yes it is in correctly with brine seal right way, etc....

Feedback appreciated.

Thanks

Matt

 

James

Active member
Messages
845
It shouldn't be that high to start with, and those are myths about it taking weeks to settle in, a few hours maybe, but not weeks.

What is your resin like?

James.

 

Matty H

Member
Messages
788
Resin is irrelevant James, as I have an ionics system, that is the reading after RO into the tank. I was easily getting 8 on my last membrane before it started creeping up. resin obviously bringing it down to 0. faulty membrane perhaps?

 

James

Active member
Messages
845
Ahh yes I see, umm perhaps a faulty membrane. But it's very rare you get one of these.

What's the pressue your pushing the water through at? Also do you use a booster pump?

James.

 

Matty H

Member
Messages
788
I have 55psi no booster pump - nothing else has changed on the set up just membrane. I will leave it for a week to see if the readings come down perhaps

 

James

Active member
Messages
845
Thats a good idea, if it doesn't come down I would suggest looking at a booster pump. I ran mine at 55-60 psi but my ppm readings were still over 15..

I bought in a booster pump as my window cleaning friend said my concentrated pressure wasn't high enough and the booster pump brought my readings down to 0ppm.

James.

 

Hinty

Member
Messages
320
Location
none
We changed one a while back - took 3 or 4 days to come down - using 1000 litres per day.

Would bear with it for a bit.

 

Matty H

Member
Messages
788
Hi Hinty

Thanks for the advice I'm on my 2nd 600ltr tank fill now as we speak and I'm getting 28ppm - will see what happens within the next week. Running that through the resin is going to use it up quickly though so will only bear with it for a week then contact supplier to see what they think!!! Matt

 

Hinty

Member
Messages
320
Location
none
Hi Matty,

Had a thought -

If you disconnect the pipe between the pre filters and the R.O. and take the TDS reading,

then take the TDS reading of the waste water, and the TDS of the product water.

Then add the Waste & product TDS readings together, and subtract the input TDS, then it will tell you how much is coming from the filter itself - which should decrease quite quickly.

Hope that makes sense.

 

Matty H

Member
Messages
788
Ok lads listen to this; the supplier is telling me that a new membrane has to be flushed for 24 hours to remove all antibacterial process put on during manufacture???? Are they trying to fob me off here? That's seems a ridiculous amount of time to flush and as I'm on a meter would cost a bit of money in water. if I do it and still doesn't work I won't be very pleased

 

Hinty

Member
Messages
320
Location
none
I am surprised it's 24 hours.

You could still use the water - but it will take a bit out of your resin.

Would normally fit as usual, then discard the product water for an hour, then reconnect the resin.

It would be good to hear how it works out for you.

 

James

Active member
Messages
845
Ok lads listen to this; the supplier is telling me that a new membrane has to be flushed for 24 hours to remove all antibacterial process put on during manufacture???? Are they trying to fob me off here? That's seems a ridiculous amount of time to flush and as I'm on a meter would cost a bit of money in water. if I do it and still doesn't work I won't be very pleased
Sounds a bit dodgey to me mate, I don't think they are telling you the truth there some how.

James.

 
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