RO/DI unit from Captive Purity question

[hillegom]

There is a flow diagram on page 9 here.
http://www.watergeneral.com/support/pdf/RD100.pdf
Out of the first 3 filters, it goes to the high pressure, in side, of the ASV then out to the ro membrane high pressure side.
But if you bought a ro filter system, already together, except for the water in and ro water out to your tank, also drain connection, Then normaly the ASV is already connected. Follow all the lines, you should see the ASV under one of the cigar shaped filters on top of the unit.

[newreefer_59]

Thanks...mine is a 4 stage system. Would you know of the flow chart for it please?

[hillegom]

No, I don't. But basically it should be the same, except for missing a filter before, or one after, the
RO membrane. They should all have the ASV before the ro membrane and a flow restrictor on the drain. This should limit your drain water to about 1:4 ie one gallon of ro water to about 4 gal of waste to drain. There are better units that do a little better, but count on about 1:4