[C320-list] Toilet Smells

[Dave Hupe]

To try to eliminate smells I had replaced every associated hose (sanitary, water supply and vent).  I also exclusively use fresh water flush (spray from head sink).  I also replaced the toilet joker valve. Lastly, I use Raritan K.O. and C.P in the toilet and tank https://fishbrain.com/shop/gear/100157340/raritan-potty-pack-wko-kills-odors-and-cp-cleans-potties-1-of-each-32oz-bottles

Improved but not completely resolved!
A previous owner had installed a larger waste tank. I suspect that they had possibly overfilled the original tank and had leakage somewhere.  Leakage from the tank area or leaking hoses/connections could migrate into the boat's structural grid.  I may still have previous residue that has not been cleaned up and I don’t  know how to remove it short of flooding the area with a bleach solution ( and I am not anxious to intentionally flood anything). 
Another item that many have mentioned is replacing the outside vent to a larger one to eliminate odors.  I have not yet tried to tackle that since there is not a lot of working room, but can attest to the fact that the vent hose coming out of the tank is 3/4 inch diameter but the stock vent fitting accepts smaller hose 1/2 inch. When I replaced my hoses, I installed a reducer to assure that the hose was tight on the vent barb. The original vent hose was not tight. 
Dave Hupe 
1994 C320 #32