Oh by the way here is your post from 2001. I had Googled MPI sanitation hoses and it came right up.
Peggie Hall/Head Mistress 09-08-2001 03:27 pm You don't want either one
Lawrence and MPI brand hoses are the least odor resistant of sanitation hoses.The only sanitation hose I recommend is SeaLand "OdorSafe" brand hose. Although it's considerably more expensive than other other hoses, it's so resistant to odor permeation that I've yet to hear of a single case of odor permeation failure in the 7-8 years it's been on the market, whereas most hoses--black or white--permeate in 2-5 years...sometimes within months. If you can't find it locally, give Sealand a call at 800-321-9886.