81 Gallon Custom Roto-Mold Marine Water Tank (MPN: MW-281)

Description

The Custom Roto-Mold 81 Gallon Marine Water Tank (Part# MW-281) is purpose-built for potable water storage in mobile and marine applications. With a low-profile, rectangular footprint, this tank is ideal for installations where space to space fitting is critical—such as beneath decks, inside benches, or along structural voids in boats and RVs.

Molded using advanced rotational technology, this one-piece tank delivers seamless strength and excellent resistance to cracking, leaks, and deformation. It’s engineered to handle the rigors of marine environments, including vibration, motion, and saltwater exposure.

Manufactured from FDA-approved polyethylene resin, the tank meets FDA Regulation 21 CFR 177.1520 (1) 3.1 and 3.2, making it safe for drinking water use. The tank ships blank, allowing custom fitting placement to suit your project.

Key Features

• 81-Gallon Capacity: Suits larger marine water systems requiring extended supply.
• Rotationally Molded Design: Seamless, durable, and crack-resistant.
• FDA-Compliant Polyethylene: Safe for potable water applications.
• Space-Conscious Layout: Measures 70" x 26.75" x 11.75", ideal for low-clearance installations.
• UV-Stabilized Material: Withstands sun exposure without degradation.
• Marine-Grade Build: Engineered for saltwater resistance and mobile conditions.
• Blank Tank Configuration: Ships without fittings for full layout flexibility.
• Natural Translucent Color: Easily monitor water levels at a glance.
• Reinforced Wall Thickness: Provides strength in both stationary and moving installations.
• Made in the USA: Precision manufactured in Oregon under strict quality control.
  

Specifications

• Product type: Marine fresh water tank
• Part number: MW-281
• Capacity: 81 gallons
• Dimensions: 70" L x 26.75" W x 11.75" H
• Weight: 78 lbs
• Material: FDA-compliant polyethylene
• Wall thickness: Approx. 0.25"
• Color: Natural (Translucent white)
• Fittings: Blank (no pre-installed fittings)
• Manufacturing location: Oregon, USA
• Application: Potable water (Marine use)
  

Shipping & Warranty

Shipping Information

• Manufacture Lead Time: 3-5 Weeks 
  
• Ships From (State): ID
  

Products are subject to freight or parcel shipping costs. Shipping charges are calculated at checkout based on delivery location, product size, weight, and carrier requirements.

Each tank is manufactured and assembled in the USA using high-quality materials and strict quality control standards—built for long-term, dependable use in demanding applications.

Warranty Information

Custom Roto-Molding tanks are covered by a 5-year manufacturer warranty from the date of original purchase against defects in material and workmanship. Coverage applies to tanks that are correctly installed and have not been subjected to abuse or misuse, and is for the benefit of the original end user. The warranty does not cover misuse, fire, accident, negligence, transit damage, unauthorized modifications, excessive external pressure, abnormal use, product loss through leakage, or related injury/property damage. Manufacturer liability is limited to repair or, at its option, replacement of a qualifying defective product, subject to written notice within the warranty period and return of the item to the point of manufacture with transportation prepaid. For warranty details or to initiate a warranty claim, please contact Tank Supply Direct at info@tanksupplydirect.com.