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3-15 Gallons 16-28 Gallons 30-50 Gallons
52-260 Gallons
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With our one of a kind software, we provide the ability to place your fittings on the tank where you need them, and place the order online.

Above are the tanks we provide for online ordering. The tanks are split into categories by their gallon capacity. These tanks are only rectangle, offering a user friendly feature to place the fittings on the tank where they best suit your needs.

If you have any questions about fitting placements and sizes, you can follow This Link and be taken to our Q&A

The dimensions are indicated in inches and are calculated as exactly as possible. However, due to the nature of the Roto-Molding process and the physical properties of plastic, a slight swelling and shrinking may occur. Please keep this in mind if your project demands close tolerances.


All tanks are made custom per order and cannot be returned.
Tanks are exempt from any Free Shipping Promotions


If you do not see a tank that will work for you here, please follow This Link to our main tank page where you can choose our rectangle tank list or our odd shape tank PDF. Once you have found a tank that will work for you - follow the instructions on the printable diagram at the top of the page and email or fax it to us to place your order.
email: info@marinesan.com
fax: 206-633-0317


Pricing Basics

Standard tank prices include:
  • Any 1/2" - 1-1/2" FNPT Spin-Weld fitting (friction weld). Typically all you need is an inlet, a discharge and a vent fitting. But you can add as many as you need at no extra charge.

Fittings that are not included in the standard tank price:
  • 3" Cleanout with Cap - $15.00
  • Diptube discharge kit - $34.00 -A custom length Diptube is created by adhering a PVC pipe to a MPT x Slip fitting that threads into an 1-1/2" FNPT spin-weld fitting on the tank. The pipe is measured to sit approx 1/2" from the bottom of the tank, making it a very efficient way of evacuating your tank. Both a straight and a 90 degree hose adapter option is included with this kit (not glued).*Use PVC Primer and Cement to finish*


Freight is not factored into the standard tank price! Shipping options will be provided upon checkout.

Holding tanks are excluded from any Free Shipping Promotions.