Terrible Advice Tuesdays: To avoid setting up a top off reservoir or having to refill your top off reservoir, just plumb the output line from your RODI unit straight into your sump. Then install a float switch shut off valve to turn on/off the water flow as the water evaporates out of your tank.
The rest of the story: Please don’t EVER do this…EVER. The reason is that if the shut off valve fails then your RODI unit will continuously make water and empty the water into your tank. Your sump will fill with water and then overflow all over your floor.
Oh and don’t forget that you’ll be continuously filling your tank with freshwater, so your saltwater tank will become a freshwater tank, killing everything inside.
The safest way to set up your auto top off unit is for your RODI unit to be plumbed into a holding container that is separate from your tank AND separate from your top off container. This will prevent your tank from continuously having freshwater pumped into it in the event of a float valve or switch failure.
Again, please don’t ever plumb your RODI until straight into your tank or top off reservoir. Just last week I got an email from a viewer who made this mistake and he came home to flooded house.
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