In my rear storage locker (accesable from outside) there are two 1/4 turn valves. They are something to do with the fresh water system because they are connected by a tee to the fresh water plumbing. Anybody have any idea what they control? They are both closed now and everything seems to work fine.
You are probably correct. Probably one for cold, one for hot. After leaving the valve the piping heads down through the locker floor. Where it goes after that I could only guess. Probably right to the ground! Think I will try one and see.
No. My "H" valve arrangement is right next to the water heater which is amidship, road side, under the dinette seat. These are at the rear in the storage locker. We don't winterize here in Florida so I don't get to play with the "H" valves very much but I know they are there!