[joshem]

Hi all,

I currently have an HF4 4040 RO system which has been good for around two years but now the TDS out has crept up to about 38ppm. I don't use a booster pump but, after reading more about them here, I think it's the best idea. When I got the RO new it was 13ppm TDS out (and around 300ppm in).

As you can imagine I'm eating up the resin at the moment. So a couple of things I wanna know:

1. Which pump is best for my RO?

2. Booster pump and permeate pump. What do I need?

3. Is there any way of getting the out water low again? I've heard backflushing etc. but I dunno how you go about doing that.

4. Is having waste water at full now and again helpful?

Thanks in advance!

[Smurf]

Don't think a boster pump will help you as seems that membrane is on the way out to me.

Is that ppm reading taken after a few mins when the ro starts up?
Also have you set the waste to pure ratio properly to try and lower the ppm output?
When did you last change the prefilters and what prefilters are you using?

[Arnold Palmer]

False advertising. If I'd known this thread was about ro systems I'd never have opened it.

Reported to mods.

[Smurf]

False advertising. If I'd known this thread was about ro systems I'd never have opened it.

Reported to mods.

Never mind as I'm sure you can crack one off still just by watching this vid   
https://www.youtube.com/watch?v=CxVqaezrq7M

[CleanClear]

Hi all,

I currently have an HF4 4040 RO system which has been good for around two years but now the TDS out has crept up to about 38ppm. I don't use a booster pump but, after reading more about them here, I think it's the best idea. When I got the RO new it was 13ppm TDS out (and around 300ppm in).

As you can imagine I'm eating up the resin at the moment. So a couple of things I wanna know:

1. Which pump is best for my RO?

2. Booster pump and permeate pump. What do I need?

3. Is there any way of getting the out water low again? I've heard backflushing etc. but I dunno how you go about doing that.

4. Is having waste water at full now and again helpful?

Thanks in advance!

A few of the lads on here recommend the Gardiners one for about £400.  To quote one reviewer...... "It's amazing, I couldn't believe how well it worked. "  Can't beat that for a recomendation.

[CleanClear]

4. Is having waste water at full now and again helpful?

If i'm understand you correctly then yes, that is what we call "flushing". Just let it all go to waste to flush your RO. Maybe 30 mins to an hour.