Weird grey tank overflow

Ahoy, Podsters:

Okay, took out our new-to-us 178 for it's first shake down cruise.  I'd fixed the delaminating trim and diamond plate with solid deck screws--seems tight.  We get to the campground, hook up the city water, all systems are go.  We leave to attend our event and--thank goodness!--a friend at the campground calls us and says there's water pouring from underneath the trailer and water on the floor inside.  The CC host had seen the leak and shut off the water connection--a great help.  So, we cancel our plans and race back to the CC.  Not much water on the floor, but the shower pan is totally full, and it seems to have been leaking/flowing over the small gap where it meets the wall.  I go outside and pull open the grey tank--and that bugger is totally, totally full!  So how the hell does a city water line flow into the grey tank?  And, more to the point, how do I fix it?  We were able to put water into the regular water tank and use the on-board pump, and everything worked fine for the remainder of the weekend.  Help!

Thanks.

Scott

Campgrounds may have water pressure that far exceeds the Pod plumbing pressure capacity. A couple of suggestions.

Thanks, guys.  I don't think it was a drip.  This was A LOT of water, and we were only gone for a few hours.  The pressure issue could be the key, and FOR SURE, we'll turn off connection any time we leave the trailer.  So, there IS some sort of pathway that allows city water to get into the grey tank other than a dripping/running faucet or shower?  This seemed really weird.  Why have this for a tank that is for runoff, not fresh water?

Thanks.

Scott

Originally posted by GlueGuy So the hookup goes like this: city water -> pressure reducer -> supply hose -> filter - rpod.

+1. This is how we run our water as well. Another advantage to having the filter at the Pod end is it will filter out any sediment that might have gotten into the hose.

Boy, this is a real conundrum.  The problem is that we didn't see any faucet's on when we left.  But maybe the sound of the AC and not looking closely enough led us to miss a flow in the shower.  That really seems to be the only place it could get in.  Later, I hooked up the city water again--after making sure ALL faucets were closed--and the grey tank appeared to be taking on water again.  I believe I had fully drained the tank.  I've got a message into rPod.  I'll definitely get that regulator!

Scott