I've had my sump fill with water a couple of times and have had a difficult time figuring out where the water is coming from and why. I have a somewhat elaborate ATO system with 3 pumps, an Optical Sensor with back-up Float Sensors (one above and one below the optical sensor) and a complicated Programmable Logic scheme, any of which could be at fault.
My sump filled again during the night and I now have suspicion that water is siphoning thru the Maxi-Doser tubing. I was initially concerned about this possibility when I set it up but watched closely for siphoning previously and never saw it occur. But I'm wondering if there may positions of the dosing wheel where water is allowed to seep.
Has anyone witnessed siphoning, or would you say that my suspicion is plausible?
My other 2 ATO pumps are Sicce pumps which I know will siphon so I have the outlet tubes empty into a PVC pipe that is higher than the RO/DI reservoir level. (See photo). For now I've re-routed the Maxi tubing so it is also entering this pipe which will eliminate the siphoning possibility (but I would like to know for sure if this was the culprit). The photo shows the pipe coming up the back of the tank. The (lower) red and the blue tubes come from RO/DI reservoir (one for "KALK Pump" and one for "Backup Pump.") I now placed the Maxi (upper) red tube in the top of the pipe, temporarily, at least, until I figure out the problem. (The Maxi is used for RO/DI "Non-KALK" water). Previously this tube was in the sump (below the reservoir water level).
On a related subject: I have had occasions to believe that my Optical Sensor has not turned on, and has not turned off, when it should have. Has anyone had problems with the Optical Sensor not functioning as it should? Luckily, my backup LOWER and HIGHER Float Sensors have saved me a couple of times but if the Optical Sensor cannot be deemed reliable, this may become disturbing. (If my Maxi tubing has been leaking/siphoning from time to time, then I shouldn't be quick to blame the Optical Sensor for not shutting off pumps, but there is still the issue of pumps sometimes not being turned on when they should be).
Thanks for helping!
My sump filled again during the night and I now have suspicion that water is siphoning thru the Maxi-Doser tubing. I was initially concerned about this possibility when I set it up but watched closely for siphoning previously and never saw it occur. But I'm wondering if there may positions of the dosing wheel where water is allowed to seep.
Has anyone witnessed siphoning, or would you say that my suspicion is plausible?
My other 2 ATO pumps are Sicce pumps which I know will siphon so I have the outlet tubes empty into a PVC pipe that is higher than the RO/DI reservoir level. (See photo). For now I've re-routed the Maxi tubing so it is also entering this pipe which will eliminate the siphoning possibility (but I would like to know for sure if this was the culprit). The photo shows the pipe coming up the back of the tank. The (lower) red and the blue tubes come from RO/DI reservoir (one for "KALK Pump" and one for "Backup Pump.") I now placed the Maxi (upper) red tube in the top of the pipe, temporarily, at least, until I figure out the problem. (The Maxi is used for RO/DI "Non-KALK" water). Previously this tube was in the sump (below the reservoir water level).
On a related subject: I have had occasions to believe that my Optical Sensor has not turned on, and has not turned off, when it should have. Has anyone had problems with the Optical Sensor not functioning as it should? Luckily, my backup LOWER and HIGHER Float Sensors have saved me a couple of times but if the Optical Sensor cannot be deemed reliable, this may become disturbing. (If my Maxi tubing has been leaking/siphoning from time to time, then I shouldn't be quick to blame the Optical Sensor for not shutting off pumps, but there is still the issue of pumps sometimes not being turned on when they should be).
Thanks for helping!