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7800 Greensand Filter Installation & Startup Guide
Strong sulfur odor before and after
Greensand filter
Pink water (permanganate) in
household water
Potassium permanganate tank over-
filling or over-flowing
More Troubleshooting Tips
Potassium Permanganate Not Being Sucked In During Regeneration
Most problems occur when the 7800 is not drawing in the potassium permanganate. Make sure the
injector is drawing in the potassium permanganate:
1. Remove the permanganate solution tank tubing where it enters the 7800 control valve.
2. Turn the regeneration knob clockwise on the timer assembly until a backwash is started. After
it is in a backwash cycle, turn the regeneration knob some more, and it will advance to the next
cycle, which is the Brine Cycle, where it is supposed to suck in the permanganate solution.
3. If is sucking strongly, check the potassium permanganate solution tank float inside the brine well
and make sure there is no rubber bands around it, and that is free of obstructions. In some
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Greensand media
exhausted
High levels of
hydrogen sulfide gas in
well water
Inadequate backwash
of Greensand Filter
Clogged brine injector
Inadequate rinse time
Too much
permanganate
Clogged brine injector
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Replace Greensand media with new
Greensand.
In some cases, the greensand filter may
need a chlorine feed (or ozone, oxygen or
other oxidizer) prior to the filter. Make
sure Greensand filter is working correctly,
and try regenerating it once or twice a day
for one week. If odor persists, replace
Greensand media or add a chlorinator
ahead of the Greensand Filter.
Make sure Greensand Filter has adequate
backwash at a good pressure and flow rate
Clean or replace injector
Set rinse cycle to longer time
Lower float so that level of permanganate
is lower in permanganate solution tank.
Clean or replace injector
Rev 120214
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