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4040 Setup questions
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[GQC] Tim
Cleanitup God
Posts:
4536
4040 Setup questions
«
on:
August 10, 2009, 01:27:07 am »
What should be the percentage Pure to Waste roughly on a 4040? A search on the forum showed some varying figures. I assume 50 to 60% waste is good for optimal life expectancy?
TDS in 280ppm
50psi pressure
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Pj
Guest
Re: 4040 Setup questions
«
Reply #1 on:
August 10, 2009, 08:41:04 am »
There's 2 ways of looking at this:
1. Go by supplier/manufacturer recommendations for preserving the long life of your membrane. Which will probably be something like the ratio you're thinking.
2. Put an inline TDS meter after your membrane, if you haven't done so, then ease your waste to optimal production.
Depends whether you're bothered more about volume of waste or life of membrane. There may be a bit of trade off.
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[GQC] Tim
Cleanitup God
Posts:
4536
Re: 4040 Setup questions
«
Reply #2 on:
August 10, 2009, 08:43:31 am »
Yea I would like to preserve the membrane a bit.
I read on RO man it should be around 3 to 4 gallons per gallon of pure, that seems very excessive doesn't it? That's like 75% waste.
I'm not on a water meter though, so I'm not too bothered about waste, but still wouldn't like to waste that much.
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Pj
Guest
Re: 4040 Setup questions
«
Reply #3 on:
August 10, 2009, 09:05:45 am »
Well, you've answered it yourself really. Follow their guidelines.
I go at about 50/50 and sometimes 60/40 (40% waste).
Maybe that's why my membrane only lasts 3 years max!
And I'm on a meter
It all gets recycled...eventually.
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[GQC] Tim
Cleanitup God
Posts:
4536
Re: 4040 Setup questions
«
Reply #4 on:
August 10, 2009, 10:07:21 am »
3 years is not too bad I would say. Is that with a softener as well?
Think 50/50 sounds about right. I think it would help tremendously if we had some database with all the figures in it. A simple forum search turns up too many things.
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4040 Setup questions