For what its worth, about 9 or 10 years ago I replaced our original smelly sanitation hose with 100% vinyl hose. It starts off clear, is very flexible, reasonably priced and it does not smell. I have installed the white sanitation hose in a previous boat and it was a pia as well it started to reek within a short period of time. There are a lot of choices and I am very happy with ours. Whatever you choose, dip the end in hot water to assist installing it on the fitting and of course double clamps are a good thing! Another thing to consider is installing a shut off valve between the head and holding tank should your joker valve fail and back fill the toilet. It also allows you to repair the joker valve without needing a pump out first.
Len Mitchell Crazy Legs 1989 37+ Midland On. Sent from my mobile device. _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray