Quote:
Originally Posted by Horace
For those reading you need to avoid syphon both directions. You need to pump OUT to a point higher than the topoff container ( I use a RO Solenoid with multiple safety float switches instead), and you must not have the exit of the topoff water hose under water or it will create a back syphon. I personally like low maintenance, so I prefer the slightly more dangerous method of hooking to my RO unit and using switches and failsafes instead.
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The problem with going directly to the RO is that the ATO probably doesn't run long enough to get 0 TDS water before it shuts off. I know my ATO runs 30 seconds or less which is not enough to get good water from the RO. So you may as well just have it directly from tap water.