@Drop That Sound
Solenoid...bloody brilliant!!!
1/4'' 12V DC Push Connect Plastic Solenoid Valve - Electricsolenoidvalves.com
View attachment 5352673
This will be a perfect fit. I have numerous timers and old 12V power bricks. I can just chop the end off and crimp on some blade connectors.
It will also be very cost effective compared to those pressure tanks, I have a Y fitting on the end so I can fill 10 gallons for about $20.
I know the large tank float valve setup is easy, but I have the RO mounted on the wall in my laundy cubby and didn't want a large barrel in the way.