I know this is an old thread but I thought I would give my experience with these. I have had at least 4 osmolators over the years and I used to work at an LFS where we installed/sold nearly 100.
I have had pretty good luck with the pumps. My current pump is at least 6 years old as I haven't replaced it since my last tank move. On the other hand, I had multiple customers who seemed to replace the pump every 3-6 months. I never understood what was going wrong until it finally clicked. My current osmolator pump is in a container with a spectrapure dual float level controller. In other words the container never runs empty it runs to the last 3 in and then the spectrapure system turns on refilling it to the top. All of the customers who burned through pumps were commercial installs where a service technician would only stop by every 1-2 weeks to refill the top-off container. These pumps ran dry every 1-2 weeks for a strait 10 minutes before the osmolator safety timer turned off the pump. This is really bad for the pump.
As long as you don't let the pump run dry it should last a long time. It is best to top off your reservoir before it is close to 0, add a level sensor to your container to notify you that the level is low, or invest in an auto-filling system like the spectrapure one I have.
My pump quit working on my tunze ato 3155 and after doing some research I seen where this pump has problems.Is there an alternative replacment pump that is serviceable that will work with my 3155 or do I have to get a tunze?
