I've had my IntelliPh for a little over a year, but recently I started to have some problems with it. First, I noticed that my Ph was drifting higher than it normally does. I double checked the history log and it still showed that acid was being dispensed, and I tried some manual acid doses and it appeared to work, so I just kept monitoring it. But after another few weeks, I noticed that the level in the acid tank was not going down at all. Again I checked the history, which showed that it was still dosing as programmed. Next I unhooked the feeder hose and did a manual dose (emptied back into a bottle of acid) to make sure that acid was actually flowing- it was. At this point I was a little stumped- I couldnt find anything wrong. I increased the dosage to 95%, and this has exposed what the real problem is. I went out today to check, and the level of the acid tank has gone up- it is now well over the 4 gallon max limit. Additionally, the concrete and equipment around the IntelliPh is now discolored, so it looks like acid leaked out somehow.
Everytime I do a manual dose, it looks fine (I have never seen any sort of leak). But somehow I am getting backflow into the tank, and apparently that eventually leads to some acid leaking from somewhere onto my equipment pad.
I have turned off the IntelliPh until I figure this out. Any ideas of what I can check?