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Custom Holding Tanks for Marine Vessels (Freshwater, Grey Water & Wastewater)

Many larger boats have a clean water system and a wastewater system. Clean water is also known as potable or fresh water; Wastewater is known as black water or gray water.

If there’s an RV or marine water tank available in stainless steel, or aluminum, we can fabricate the same shape and size container out of lighter-weight plastic materials, including:


Request a quote for a custom marine holding tank from Miller Plastic Products below. These custom fabricated tanks start at $1,491.


Our experience can help you choose the right material for your particular custom plastic tank. We’re just a phone call or click away.

We offer free design assistance and can provide 2D or 3D drawings using AutoCAD and SOLIDWORKS

Our tanks are engineered using FEA (Finite Element Analysis) to maximize performance and allow for minimal bowing of the fabrication.

We offer a wide selection of tanks in any size or shape to fit your need. Our tanks can also be heated for use in freezing weather. The kinds of marine tanks we can fabricate to your exact specifications include:

plastic reservoirs

The kinds of plastic tanks we can fabricate to your exact specifications include:

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