Only if you can't see where the leak is coming from. The connection for incoming water is the only connection on mine that is suppose to cause an external leak. I replaced the flushing valve and yes the toilet will need to come off for that. My vent controller mounted on the rear of the "china II" toilet dripped for two months, already two years old, and then it quit for no apparent reason. Maybe water pressure had something to do with that one? Best way to figure where the water is coming from is to wrap the area with toilet paper (after wiping everything off). Good luck!!!
Don & Dona W/yorkies Gizmo, Master Chief, & Tali
2011 Flagstaff 8528 BHSS 2015 Ford 6.7 XLT
2010 Full Timers & Still Going