Gmc, equal voltages between ground and neutral and hot? Are you certain that the IsoClean is wired correctly. Would this not cause the circuit breaker to trip? Oh, I keep forgeting that you are talking about the filter box. I no longer have the IsoClean filter box, but on another filter box I get only 2.9 volts from hot to ground and 0 from neutral to ground.
Please post when you hear back from IsoClean.
Please post when you hear back from IsoClean.