I made a list of what size hoses and lengths I need and than left it on the boat 450 miles away. If anyone can tell me what is the inside diameter of the waste hoses coming off the electric heads maserator and going to the holding tank is I would be grateful. Also I need the inside diameter of the hoses coming from the lake and going to the heads. If you have a 1990- 1995 42 Hunter and could take a look it would save me much time. Thanks Tom