I apologize if this topic has already been addressed. I have access to some sections of large pipe from a local utility project. I do not know the exact pipe diameter, but somewhere in the 16 to 24 inch range. I think it is used for water transport. It is aqua-blue color and appears to be a thick-wall (maybe 3/4 to 1 inch thick), PVC material. It seems to be ideal for a Sonosub. I think it could be cut with an ordinary radial saw. Has anybody used this material before? Have you got any comments regarding the use of this material for a Sonosub? Any comments would be appreciated.