Marina Piping Brainstorming

I have recently found a distributor of marina piping called Northwest Pump & Equipment Co., and my goal is to use their "XP Marina/Aboveground Product Piping" in my design along with a few of their other products. The description is as follows:

APT Metallic Ducted (MD) pipe is the ideal choice for aboveground and marina fuel delivery systems. The MD series piping system contains our product piping inside a flexible metallic conduit. This superior construction adds fire protection, impact resistance and UV stability to what is already the highest quality piping system. The MD series pipe is shipped with single wall or secondary contained pipe already installed into the metallic jacket, reducing installation time in the field. For marinas, the flexibility of this product easily handles variation in water levels and can be installed alongside or under docks.

I would use this type of piping for under the docks due to te fact that it has some flexibility and it is made to easily handle aquatic environments.

Another website I found with some alternative solutions for a floating dock is provided by Franklin Fueling Systems. It exists at a PDF file, so information cannot be directly quoted. It provides flexible piping which will be needed in my different designs for connecting the pipes to different locations where flexibility is needed, such as connecting to sumps which provide fuel to the dispensers.