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RO Unit Output

D

dogwasher

Member
Is it time for new Membrains? The water her in Chicago is very cold so if Im correct this would slow down the output of the spot free water? In the summer I was 4 gallons rejecting for 2 gallon of spot free. Now Im at 4.5 reject to 1.5 spot free.
Here is another question....I here about changing the Charcoal but I don't even know where it goes?
 
It's normal for production to slow down with the water being cold - you can put a tempering valve on the inlet of the system to optimize production.

The charcoal filter is a large tank similar to a softener that's between the supply and the RO system. The general rule of thumb is to replace the activated carbon inside whenever you replace the membrane(s).
 
MEP001 said:
It's normal for production to slow down with the water being cold - you can put a tempering valve on the inlet of the system to optimize production.

The charcoal filter is a large tank similar to a softener that's between the supply and the RO system. The general rule of thumb is to replace the activated carbon inside whenever you replace the membrane(s).
Click to expand...

Thanks MEP, to install a tempering valve are you saying to mix heated water with the inlet water?
I see the softner tank that is a simular size to a home tank..where or how do you put in the charcoal?
 
Yes, a tempering valve is set to keep the temperature of the water flowing through it constant. You can get one from Grainger for about $35. If I remember correctly, optimal temperature for TFC membranes is 78° F.

The head of the charcoal filter is removed, then you can either dump or siphon the old stuff out and pour in new. There is filter gravel at the bottom that needs to get replaced if you choose to dump it our, but you can siphon out the old charcoal and leave the gravel bed in place and refill it.
 
Be sure the one you get will mix in the temp range you need. Some tempering valves are designed more for anti-scald, and will not adjust down to the temp range you need.

I like the solution of reclaiming my RO reject. As long as the production system keeps up with demand, and no water is being sent to the drain by the reject I just let 'er ride.




http://www.dultmeier.com/products/search/6102
 
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