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Ro problem
- Thread starter carpergaz
- Start date
Help Support WCF:
We always have to ask for more detail as you haven't provided much.
What r/o have you fitted?
What's your tap water pressure?
If it's a larger r/o, e.g. a 4040, how much water flow do you have at the tap?
What's the tds of your tap water?
What is the tds of the pure leaving the r/o before the di vessel?
What is your pure to waste ratio when filtering water?
What r/o have you fitted?
What's your tap water pressure?
If it's a larger r/o, e.g. a 4040, how much water flow do you have at the tap?
What's the tds of your tap water?
What is the tds of the pure leaving the r/o before the di vessel?
What is your pure to waste ratio when filtering water?
D
Deleted member 5762
@carpergaz I only use a small RO but mine goes in at around 260-270 from the tap and comes out around 12 or 13 I think. It does take a little while to come down though when new membranes and/or filters are fitted. How is it after it's been on for a little while?
It's a 4040 ro tap water 300 + never tested the water pressure water in tank after resin 20+ before it hits resin it was 80 then went 65 somehow I'm new to this tbh .when I put new ro in I never flushed it either ?
I think you need to give it a flush for about 20 minutes then try again.
What membrane did you fit? Was it sealed before you fitted it and did you remove the plastic film it should have been wrapped in? Don't laugh, it's happened.
Our tap water tds is +-125ppm. Our water pressure is 50 psi and freeflow water from the back tap is 13 lpm. When my HF5 membrane was new, I was producing just on 1.9 litres of pure to about 2.2 litres of waste per minute or approx 45% pure to 55% waste.
At 300ppm I would imagine your waste to pure ratio should be around 2 to 3 litres of waste to 1 litre of pure, but this all depends on your water pressure and membrane make and variant.
What membrane did you fit? Was it sealed before you fitted it and did you remove the plastic film it should have been wrapped in? Don't laugh, it's happened.
Our tap water tds is +-125ppm. Our water pressure is 50 psi and freeflow water from the back tap is 13 lpm. When my HF5 membrane was new, I was producing just on 1.9 litres of pure to about 2.2 litres of waste per minute or approx 45% pure to 55% waste.
At 300ppm I would imagine your waste to pure ratio should be around 2 to 3 litres of waste to 1 litre of pure, but this all depends on your water pressure and membrane make and variant.
Do you open the waste to full to flush and thanks for your help
doug atkinson
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Membranes are coated with chemicals which need to be flushed out. Some take couple of hours some 24 hours.
This is interesting and you have mentioned this before. 11 years ago when I first fitted my HF5 membrane, I flushed it for a few minutes and then started using it. My r/o was virtually producing at a rejection rate of 98% after that. It was a good thing as we had a school to clean, and no water left in our IBC tank.
Over time, the manufacturers must be using different preserve chemicals to what they did.
Still not coming down from 70 when I open waste right open it goes up to over 100 then when I drop it to about 50/50 it goes 70 but no lower .could the ro be wrong way round
This is written for a Champ housing, but the principal is the same for all 4040's @carpergaz
Where did you buy your membrane/ r/o from?
Where did you buy your membrane/ r/o from?
doug atkinson
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No it wouldn’t. If you have put it the wrong way round don’t put it back in the right way as it will damage it as have done that before. You will see an o ring take that out and put it the other end. Try that I think it should work.
doug atkinson
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As Spruce says would help if you said Manufacturer and part number
doug atkinson
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You need to go back to where you bought that from so they can solve. No one on here can solve it as there could be a number of issues which your supplier needs to sort.
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- 13,549
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Looks like it needs the plastic film removed?.
doug atkinson
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They look like that
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Really all the ones I have had have come with a plastic film on them that you have to remove then the material of the membrane is un covered ?.I have never seen a membrane ready for use with the makers name or written details on the membrane , obviously you are the expert in this area but it doesn’t look right to me .
doug atkinson
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They come in a plastic bag which is vacuum sealed. There is always a label on the membranes. There is a shiny layer on the top but that hold the membrane sheet in place. Where are you getting yours with no labels on.
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Varitech , and years ago Ionic’s when they used the champ housing , now have filmtech membranes and they don’t have any plastic on them you remove that before fitting them , having said that we dont replace them very frequently as tds is so low here they last around 7-9 years or so ??
