South wind gray water tank question

[Roger G]

Normally dry camp and watch tank capacity regularly but this past weekend we were at a campground with full hookups and DW was thrilled to find out she could shower to her hearts content. I had hooked everything up but hadn't pulled the gray tank valve yet but on the second morning I was sitting outside waiting on her and water started leaking from under the MH. I ran inside and checked the gauges and the gray water was full so I pulled the gray valve. There was water in the tank bay but can't see the gray tank, only the fresh and it wasn't loosing volume, definitely wasn't black water so it was either gray or fresh water coming in. After her shower there was no flow through the hose so that puts me back to the gray tank running over. All other RV s I've had would back up in the shower when the gray tank was full and had no overflow on the tank. Does the gray tank have an overflow or to I have a high leak or bad connection up high somewhere. It stopped dripping soon after I dumped the gray tank but more leaked out after I retracted the jacks and pulled the slide in. The black tank has a vent on the roof, what about the gray? Any thoughts?

[Ottawa]

Not sure what year your MH is, but my 99 would fill the bath tub first.

[Dunner]

Mine does too and my 5er did also.

[hippy]

all my tt's have filled tub first too. i cant imagine grey tank would have an overflow. my fresh tanks always have. sorry cant help you...good luck

[Roger G]

It's an 07. I suspect a loose fitting high on the tank but not sure how to get to it to check though.