Marine Holding Tanks for Water or Sewage are available in a wide variety of sizes and shapes. Select the general shape from the selections below to refine your search.

These Marine tanks are rotationally molded from FDA approved High Density Polyetheylene (HDPE). The tanks are completly sealed and can be oriented in any direction. General use of these tanks is to store fresh water or grey water on board a boat or vessel.

Since nearly every marine application is at least slightly different, these tanks are 'blank tanks' with no fittings. We are happy to install optional fittings for you or you may choose to receive the blank tank and install your own fittings. Additional charges will apply for fitting installation.

Marine Bow tanks have a tapered profile that makes the most of the shape of the front of a vessel. There are generally more than one angled side on these tanks.

Marine Side tanks are generally slanted on only one side. This allows them to take advantage of the shape of a boat hull mid-ship. To store water across the width of the vessel, set two opposing side tanks.

Marine Stern tanks are mostly rectangular in shape to take advantage of the mostly right angles found in the stern of a vessel.