RO question?

[Anonymous]

In the picture below, you will see the sump and WC tank diagram that I developed a while back in a different thread.

Now I want to nail down how to feed the sump with makeup water that will be passing through a DIY kalkreactor that is not shown in the sketch.

Here is my quandry. After I do a water change, the wc tank will be taking all available RO water leaving none for makeup water. This will last for a few days, depending on how the RO's GPD.

What, asides from buying a seperate RO unit, would be the best way to overcome this?

Louey

 

[Anonymous]

Is there a float switch on the kalk reactor? if so, have the ro water T off and one side hit the kalk, once it fills up, the ro will pump to the sump.

B

 

[Wheeldog63]

What if you installed a float switch in the sump that was connected to the waterchange line. When the sump level was suffecient then the solinoid would open and fill the WC tub. But when the sump level droped the solinoid would close and the RO water sould add to the depleted sump and bypass the WC tub. I will try to modify your picture and if you have any questions just ask cause I can visualize how it would work in my head but might not of articulated it well on here.

~Kelly

 

[Wheeldog63]

Here see if this pic is any better:

 

[Anonymous]

Wheeldog said:

What if you installed a float switch in the sump that was connected to the waterchange line. When the sump level was suffecient then the solinoid would open and fill the WC tub. But when the sump level droped the solinoid would close and the RO water sould add to the depleted sump and bypass the WC tub.

This is a good idea. The float switch that you are reffering too would not allow the WC tank to be filled unless the sump level was at running level.

I wonder if it would be bad for the RO unit to be under this much demand?

That WC tank will be 75 or 100 gallons and I imagine the tank will evaporate 5 gallons per day. My RO currently produces 35 GPD. So in the case of 100 G WC tank it would take 3 to 4 days for the tank to re-fill. The RO would be dripping for the entire time.

Louey

 

[taikonaut]

>... I wonder if it would be bad for the RO unit to be under this much demand?

Actually, it is better to keep the RO working more instead of getting a overrated filter, and use it at 1% of the capacity. Economically, it is cheaper that way, and chemically, there will be less membrane TDS creep problem. For your top-off and water change rate, 35 to 50 GPD is more than sufficient.