RO/DI setups

[daplatapus]

Hillegom:
I don't have an electronic solenoid valve on my water supply, just a manual one. That would certainly work to shut everything off and would really make an ASOV redundant.

Lol, well now I'm feeling just a bit sheepish. I totally forgot I ordered an ASOV and check valve from Ray and it just showed up. So I went downstairs to hook it all up and upon closer inspection (a lot closer) there is a ASOV hiding way in behind my dual membrane that I never saw there before. But there isn't a check valve. So I inserted it and now my waste water does stop (albeit after about 3-5 min) once the pressure rises enough to cut out the booster pump.

So I guess that at least helps to shut it off if I forget to turn the system off.

[mark]

The pressure tank is not needed.

In the diagram I put up, follow the flow. The back pressure across the asov is created when the float valve (connected to output of di) in your brute is closed forcing the diaphram in the asov downward to shutoff flow coming from the third stage. The check valve is required so the asov doesn't reopen due flow in waste line removing pressure. The source of the pressure is from the supply (even with pump off).

[daplatapus]

Yeah, that's right. With it set up that way, my RO/DI system will kick in every time the ATO pump does and draws a bit of water out of the Brute. I guess now I am wondering if a pressure tank or two would supply say 2 or 3 cycles of my ATO before my RO/DI system turns on, thus prolonging the run time through the membranes to avoid what Mike was describing in his post.
That might have been why, in my brain, I thought 1 long cycle of the RO/DI was better than many quick cycles that this set I now have gives me.


... and then again, maybe I'm totally overthinking the whole thing, lol

[mark]

to my mixing station I come off the rodi to the water barrel. Water barrel has a float valve and a small JG type valve between the rodi and the float. When I want to fill the mixing barrel I open the JG valve a the float prevents a flood.

You go do similar, every few days refill the brute, your ATO doesn't short cycle your rodi.

[daplatapus]

Anyone ever use one of these? Although, now that I've thought about it for 2 seconds, I guess an Apex could accomplish the same thing...
http://www.buckeyehydro.com/hi-lo-ta...el-controller/

[mark]

Apex with 2 float switches, or DIY with couple of float switches and a relay. Big thing is upper and lower limit you can set a distance (volume) apart.