Gray tank valve will not close
I'm looking for some help with this. My gray tank valve is constantly open, despite the switch being in the right position (closed). I've tried opening and closing but it will not close. I'm connected to sewer which makes it ok (functional), but this is not ok. Black tank valve and macerator both work fine.
Fred and Cindy, CA
2008 Marathon XLVII, 2018 Raptor (towed)