RO systems & flow restrictors

[banditpowdercoat]

Pressure and cold really affect the speed of RO water. Im running approx 70psi here at my house, and with cold water, I get 40gpd or so. It's a 50GPD membrane and restrictor. Most RO systems are rated at 72*F water and 65-70PSI I think. Higher water temps really increase the filtered water output of my system. It's a Kent RO/DI unit I have, but they are all pretty much the same.

[Doug]

Thanks Dan. So @ 40psi, he is pretty low and along with the cold water, bad water making.

I was reading the ro thread on heating the water in the main forum but thats a reefing application. Anyone have any ideas for a typical under the sink unit. Perhaps we should draw the water someplace else so it can be heated somewhat bu the time it gets to the ro but then I,m guessing we need a booster pump, which it look like may be needed anyways.

Or the variable restrictor Mark mentioned?

[mark]

DIY mixing valve?

Won't need something fancy (as for a eye wash station with a fixed temperature complete with recirculation pump), but could you tap into the hot and cold lines, valve on each for some adjustment, Tee, then ro unit?

My Dad had something this for years connected to a outdoor tap so he could rinse the dog (old dog) with warm water.