Quote:
Originally Posted by mike31154
So your RODI runs for short bursts to top off your system? Usually not a good idea due to TDS creep. RO systems work most efficiently when used in longer runs, not short 5 minute bursts. I know you guys on the coast have pretty low source TDS, so might not be an issue. I would never do that here with a source TDS in the range of 180. It takes a good 3 to 5 minutes to get the the RO output TDS down to 1 from 20 or more on initial start up. And if I ran that 20 TDS on start up through my DI stage with multiple short on/off cycles on a continuing basis, it wouldn't take long to exhaust the media. Without the DI stage I'd be adding unwanted TDS to my tank in pretty short order.
|
I have a DI stage (which is what goes down to my sump), and my final output is always 0 or 1 TDS (have an inline dual TDS gauge showing after RO and after DI final water). Also my RODI has an ASOV, to reduce wastage, and pressure storage tanks for the RO water, so I always have a ready supply. We have a kitchen RO faucet too, which is used all the time. Have not had to change my membrane for 5+ years, and DI is 2+ years, and still good.