>How big can you buy PVC pipe and endcaps? I think I have seen 10". >12 footers would float about 269 lbs if my math is right. How much >would three deep cycle batteries weigh? > -- >Its possible to buy PVC-C pipe up to 12" bore with end caps in 18' >lengths this type of pipe does not thread very well so all joins >have to be glued. Regards, Garry >