I have had a strong smell near my holding tank so I replaced the 1.5 inch hose from the holding tank to the head with Raritan Sani Flex without issue. After I replaced that hose I noticed a very strong odor coming from the 3/4" vent line that comes off the top of the tank and vents out to a stanchion. My challenge is that it seems all the high quality odor resistant hoses appear to be only offered in the 1" or 1.5" size. The next best hose that I could find is the Trident VAC XHD Sanitation Hose #148 - 3/4 Inch. I was hoping to be able to find the higher end quality rubber hoses but unfortunately they seem to be only offered in larger sizes and my current vent hose goes through a couple of cabinets and would be near impossible to go from 3/4" to 1". Any ideas appreciated. Thanks