YachtFlex White Extra Premium Ultraflex Sanitation Hose is desgned specifically for marine sanitation. It has four important qualities compared to other hose types: Impermeability Flexibility Longevity Durability Marine sanitation professionals all agree, choosing the right sanitation hose can make all the difference in the livability of your yacht. Foul odors on a boat are unpleasant at any time, but especially while underway with guests who may already be experiencing seasickness. Permeation of sewage hose is a common cause of unpleasant odors. Many PVC hoses on the market are stiff and very permeable, sometimes leading to unpleasant odors after just a few months. Likewise, rubber hoses that are not properly designed for sanitation use can permeate after just a few seasons. Some rubber hoses have unnecessarily thick walls that can create issues when passing through bulkheads or tight spaces. By contrast, YachtFlex is specifically designed for sewage and wastewater, and has a standard wall thickness and good flexibility for headache-free installation. Furthermore it's more resistant to degredation from seawater and heat cycling, so it lasts longer and is easier to service when the time comes. YachtFlex is the best option on the market for marine sanitation hose. YachtFlex hose is made up of 4 layers: The inner most layer is Butyl Rubber, the 2nd layer is a wire helix for flexibility, the 3rd layer is fabric reinforcement, the 4th and outermost layer is a white wrapping made of EPDM. 2 inch hose is used on some smaller macerator toilets and sewage treatment systems. This hose is also highly suitable for greywater and any non-exhaust raw water applications. Sold in 1 Foot Increments.