RO/DI setup

[TheReefGeek]

Ok, a few choices, here are some setups I recommend:

1. Float switches in your garbage can that control a sprinkler solenoid that controls the input of water to your RODI. Multiple float switches is recommended, at least one higher than the other so if the lower one fails the other kicks off the water production. Even better is 2 in parallel, and 2 in series so that one from each bank of 2 needs to get triggered in order for water to flow. Very important is controlling the voltage to the float switches so they done melt open. (if you are using the cheap float switches your wire yourself, if you are using $50+ float switches already wired then no worries)

2. Float valve in your garbage can. Float valve will close when water level is reached, and this builds up pressure in the line. You then need a hydraulic valve/switch (Aquasafe units come with on built in) that will get activated when it detects the pressure increase (membrane moves/flips from pressure) and shuts off waste water production. Without this, when the float valve closes, your RODI unit will keep producing waste water. Also, this method will only work well over short distances, so it depends on where the RODI vs. garbage can is, you might need to install pressure bladders to trigger hydraulic switch if the line is too long.

This is just to keep the reservoire filled, you can then run the garbage can to your sump with a float valve to keep your sump at a constant level, or a pump controlled by float switches.