Call VPI they will tell you how to proceed.
10 responses Add your response
Mine is about 10 years old and I've never had any problems with draining the fluid. After draining I regularly flush mine out further with water. It sounds like the drain going out to the hose might be clogged. Might want to check again with VPI to see what their recommendation is if the drain is clogged.
As mentioned, I would first suspect the drain being plugged. If you have the means to blow compressed air up the drain tube, even blowing by mouth(clean the tube first of course). It really shouldn’t take much pressure to dislodge any debris. Once you get it flowing again, flush the tank and enjoy another 10 or so years of record cleaning.