Originally Posted by wahoonc
That doesn't work too well for the gray tanks..
Actually a few years back I posted here pics of short garden hose w/screwed hose cap. I drilled both sides of the cap with a 3/32" holes. When connected to a 60 psi water source the water streams were quite strong. A Georgetown has only one GT. I found an entry via a air admittance valve below the bath sink sink. Remove valve, insert hose it's an unimpeded access to the tank internals. The only grey tank I've had that would foul the sensors,this rig was handy and for me necessary. Mark the hose for depth and rotation. Same process rotate and lift in steps, the probes will work when completed.
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