I use only water in my black tank less I'm parked w/o hookups for more than 4 days.
In another post I mentioned having more important things to do today.
I tell people I do Light RV repairs and maintance.. Not today though.
You see.. This rig is a "Bath and a half" model. the "Half" is also my ham shack, comes in handy if you are in a net, awaiting your turn, and just as you feel that old "Call of Nature' and find you have an "Urge" to go someplace.. The NCS (Net Control Sataion) Gives out your call... You see.. I'm already there.
Well.. Due to a small, unnoticed leak, and some idiot who thought that under the toilet was a grand place to plant carpeting.. The chair came loose from it's mount.
Now this is a MAJOR repair.
So today.. I dissembled the toilet. Set the bowl aside, Cut the mounting bolts off the base, (Cleaned the seals while I was at it) Cut out the rotted wood. cut new wood to replace it, adding a support or two cause of the way I did the cuts. sealed the wood (Sealer stain) so if it gets wet it won't do so much damage. This is also a primer I will paint later.
Bolted the base back on (With additional sealant between base and plumbing) re-attached the bowl and it's plumbing and tested.
I now have a very sold operator's seat once again. No leaks evident.
So, what does this have to do with this thread.
There was NO STINK from the partially filled black tank.. NONE at all while I was working
AND THE PIPE WAS OPEN
Now the GRAY tank.
When I last dumped.. The moment I opened the GRAY valve,, The Nose Knew it.