What metal OK for RO water?

[golf nut]

Originally Posted by banditpowdercoat

OK, Heres the deal.
This is for an automation of a 4 tank setup. The setup is going to be PLC(Programmable Logic Controller) controlled. The RO unit WILL have a main Solenoid controlling inlet. But also solenoids to run the RO unit for 20 min before filling the Main reservoir. Also, there will be a Run timer that after X hrs of water making, the RO unit will go into a Membrane Flush mode. When the reservoir gets to a pre determined level, the PLC will control the RO unit for a Purge, and fill of the Res. The PLC will also control independent level of 4 tanks. With this PLC, there will be safety timers for maximum RO run time as well as level control is managed bu Ultrasonic non contact level sensors. Nothing to stick, no salt creep to worry about etc.

Once this is complete, I'll be making a lighting program with another PLC.

I LOVE designing and building things

why not build the whole thing out of polymers and drive it with buried magnets