SFH10Raritan SaniFlex Sanitation Hose 1.5in 10ft length Model: SFH10 Sani/Flex Odor Shield sanitation marine hoses are designed especially for marine toilet and holding tank plumbing. Sani/Flex Odor Shield marine hose is different than other offerings on the market in a number of ways: Sani/Flex hoses have excellent impermeability. A special white butyl rubber compound is used, to stop sewage odor from escaping the hose. It is 15 times more resistant to odor permeation than standard PVC hose, and car