No problems at all, in fact I use a Y connector on my system.
ONE caution however...
If you use the 2nd hose to flush the tank put a quick disconnect on the flusher inlet and USE IT,, Unhook the hose except when flushing.. DO NOT leave a hose hooked to that fitting (Ok so I do leave a six inch hose hooked to that fitting but notthing hooked to the other end of that hose) (Make it easier to attach the charged line when I flush)
My Flush hose has both a vacuum breaker (Garden hose fitting size) and a spring check valve, then the quick disconnect.
Inside the motor home (hiden where you need to dig to find it) is a 2nd Vacuum breaker, and a 2nd spring check.
That's two belts and two pair of suspenders.. NO, I'm not paranoid, Did not know about the built in ones when I built the hose.
