56 Gallon Custom Roto-Mold Marine Water Tank (MPN: MW-359)

Description

The Custom Roto-Mold 56 Gallon Marine Water Tank (Part# MW-359) is built for reliable potable water storage in marine, RV, and mobile-use scenarios where space is long and narrow. Its elongated, low-profile design makes it ideal for tight under-bench or hull installations.

Manufactured using rotational molding technology, this tank features a seamless, single-piece structure that resists splitting, leaking, and fatigue—delivering excellent performance in harsh and vibration-heavy environments.

Constructed from FDA-approved polyethylene resin, the MW-359 meets FDA Regulation 21 CFR 177.1520 (1) 3.1 and 3.2, ensuring full compliance for potable water use. It ships blank, giving you full flexibility to add fittings in locations that best suit your application needs.

Key Features

• 56-Gallon Capacity: Ideal for extended freshwater supply on boats, RVs, or mobile units.
• Seamless Rotationally Molded Body: Crack- and rupture-resistant design for rugged conditions.
• FDA-Compliant Polyethylene Resin: Certified for safe potable water storage.
• Long, Slim Profile: Excellent for under-seat or narrow floor cavity installations.
• Durable Yet Lightweight: Weighs 74 lbs, built for strength without excessive bulk.
• Blank Configuration: Ships without pre-installed fittings for complete plumbing control.
• Marine-Grade Toughness: Resistant to UV rays, vibration, and saltwater exposure.
• Proudly Made in the USA: Manufactured in Oregon under strict quality control guidelines.
  

Specifications

• Product type: Marine fresh water tank
• Part number: MW-359
• Capacity: 56 gallons
• Dimensions: 89.875" L x 17.375" W x 12" H
• Weight: 74 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.