raft with pvc floats?

[frankrede]

If you already have the tanks, you may as well just spend the extra money and make them out of Schedule 40. That way you could power a water gun, cannon to fire a rope to pull you to shoar, whatever.
That will be more expensive, and will require larger tanks to offset the added weight of materials and such, but it would be cooler.

Then again the tanks shouldn't have any pressure in them.

[iknowmy3tables]

if the main tanks have pressure they will need a lot of air to get decent pressure meaning a lot of weight, if there is an air tank then it should be a smaller secondary one