Your RO or RO/DI unit...did you know?

[Alberta-newb]

Learn something new everday! Thanks for the info, I just ordered in a RO/DI so now I'll make plans to install a valve ahead of my reserve so I can flush away that first litre or two. Since I'm installing my unit right beside my tank, I was thinking of geting an extra 25' of tubing, coiling it up and putting it in the sump to pre-warm it a little (my supply is quite cold) Think this is a good idea?

Francis

[mark]

thread here about warming ro supply.

And cutting/paraphasing from Aqua-safe: "membranes are flow rated at 77F, 65 PSI and 200 TDS and for every 1F water temperature (below 77F), the production rate will drop 1.6%

[Myka]

^ Yep, that just means the flow will slow, it doesn't mean it damages the RO membrane.

Example...my 50 gph unit takes about 2 1/2 hours to fill a 5g jug if I use straight cold water. If I use luke-warm water (prob around 75-80 degrees) it only takes about 1 1/2 hours to fill. BUT, I'm introducing a higher TDS to my RO membrane if I use warm water, so I'll save the RO membrane, and deal with the slow water flow.

[atcguy]

I was told thats units shouldnt be run all the time. They need to stay running for 15 minutes or more ... ie to keep a resevoir filled by a float valve.. So now my controller tells me every 4 days to run my ro unit and top my resevoir up. Doing this allows the unit to run for 2 hrs to fill my container opposed to on off on off throughout the day.. Works for me