? reverse osmosis system?

I've thought about doing a similar thing, only the overflow poses a
problem given the positioning of walls, boilers, drains etc in my
house. :-/

>if the auto shutoff kicks in, will water stop flowing to my aquarium

I've not tried producing RO and DI seperately/at the same time but I
believe it would depend on where the feed into the DI cannister comes
from, and (I think) where the storage tank is in relation(vertically)
to the aquarium, in relation to the RO/DI unit

Someone correct me if I'm wrong.

If you have placed a T connector on the RO output line, and connected
one end to the DI unit, and the other to the shutoff valve then when
the valve is closed water will still flow to the DI cannister.
(I assume this is how you've set it up?)

If the feed into the DI cannister comes from the output line from the
valve, then water will not flow to the DI cannister

If you have connected an output from the storage tank to the DI
cannister then water might flow to the DI cannister (provided you get
enough pressure). I'm not sure tho......

>& if it doesn't & water is constantly flowing to the aquarium
>since it will be such a small volume,
>will the incoming presure send unnecassary amounts of water down the waste line

Not sure that I've fully understood what you're asking.

With the system permanently producing, you should expect to see 3G
waste for every 1G produced (assuming a 3:1 waste/product ratio).

However, I've noticed that I get waste water from my RO/DI unit even
when I close the valve from the output line (it's been off for 24
hours now - not sure if it should do this! - anyone??). :-/

Andi