375 Gallon Custom Roto-Mold Marine Water Tank (MPN: MW-475)

Description

The Custom Roto-Mold 375 Gallon Marine Water Tank (Part# MW-475) is built for large-capacity potable water storage in marine, mobile, and off-grid installations. Whether supplying freshwater for commercial vessels, floating homes, or expedition trailers, this tank offers exceptional volume while maintaining structural strength and installation flexibility.

Manufactured using rotational molding technology, the MW-475 features a seamless, one-piece polyethylene construction that eliminates weak points, providing enhanced resistance against cracking, splitting, and deformation even under harsh conditions. The tank is molded from FDA-approved, food-grade resin and meets FDA Regulation 21 CFR 177.1520 (1) 3.1 and 3.2, ensuring safe storage of potable drinking water.

Its long, rectangular footprint makes it ideal for deck, basement, or trailer-mounted applications where extended horizontal space is available.

Key Features

• 375-Gallon Capacity. High-volume tank for extended water supply needs in marine and mobile operations.
• Seamless Rotomolded Construction. One-piece design eliminates stress points and ensures maximum durability.
• FDA-Compliant Polyethylene. Made with resin certified for safe potable water storage.
• Extra-Large Footprint. Measures 96" L x 30" W x 30" H—ideal for flatbed mounting or built-in installations.
• Blank Tank Configuration. Ships without pre-installed fittings to allow custom plumbing configurations.
• Built for Marine and Off-Grid Use. Withstands impact, vibration, saltwater, and UV exposure.
• Natural Translucent Finish. Easily monitor water levels through the tank walls.
• Made in the USA. Manufactured in Oregon under strict quality control standards.
• Lightweight for Size. Weighs just 171 lbs, making it easier to maneuver during installation.
  

Specifications

• Product Type: Marine fresh water tank
• Part Number: MW-475
• Capacity: 375 gallons
• Dimensions: 96" L x 30" W x 30" H
• Weight: 171 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, RV, off-grid, commercial 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.