Yes you might be able to help me , as I said I will hook up the ro unit in my bathroom , mind as a 3 gal tank and 26 gal a day.
I have a 40 gal narrow commercial plactic tank that stands 3 ft high . I will stick that in a corner. But now is the trick what line do I run to this container from the r/o. the r/o instruction says that the tank shuts off when full. only on demand will the tank fill up.
the water spout for drinking is connected to that.
my understanding is the tank creates pressure that helps force water thru the filters, do all units use a tank or is this in the case of the drinking spout. also r/o i understand but what is the dI i see on some units, and what does that do. if your unit does 60 a day is the filter larger ? also that for every 1 gal made at least 7 gals is sent down the drain, they call it waste. is there a diffrent way to get quality water from the tap , that is not so envolved.
I am doing this because I get some much brown alge.
Okay Don, here's what I did ...
I cut the "blue (clean) water line between the RO unit and the pressure tank and installed a "tee" fitting. From the "tee" I ran a line to my "mixing tank" and at the end of the line I put a shut off valve. What this does is, when I open the valve the water in the pressure tank is released to the "mixing tank" in a rush. Once those 3 gallons are gone I leave the valve open and the RO unit begins it's drip,drip,drip into the "mixing tank" when that is full, I turn off the valve and the RO unit fills the pressure tank again. I imagine some time in the future I'll change this to a float switch to avoid the problem of forgetting I'm filling the tank.
The pressure tank itself is filled *after* the water is run through the RO unit and it is only used so the "faucet" on the counter will produce water for drinking or whatever. As long as you tee the line between the RO and the pressure tank the system I described will work. Regarding the DI unit, it's a deionization filter that further purifies the water, I don't have one on my RO unit. You'll hear varying opinions on it, some won't run without them, some don't use them and some run ONLY DI. The big advantage to DI is that it alone can produce water that's of the same or better quality as the RO unit, the downside is they need to be recharged frequently, depending on your incoming water quality. The reason some people put them after the RO unit is it greatly increases the amount of water that can run through the DI before recharging the media. Another advantage of a stand-alone DI unit is that it produces no waste water, so that saves money on your water bill obviously. It's a trade off either way, all these methods will reduce your phosphates (your goal as I understand it) and I think you'll probably be fine with just the RO unit you have in hand.
To summerize the plumbing:
cold tap water to the RO unit (usually the green line)
waste water to the sewer (usually the black line)
clean water to be used (usually the blue line) run from the RO unit, tee'd to the pressure tank and your "mixing tank". Then from the pressure tank, also tee'd, to the faucet on the counter top or, in my case, to the sump.
Hope this helps and feel free to ask any questions now that I've probably completely confused you.
Later,
paul