36 Gallon Custom Roto-Mold Marine Water Tank (MPN: MW-531)

Description

The Custom Roto-Mold 36 Gallon Marine Water Tank (Part# MW-531) is engineered for dependable potable water storage in marine and mobile applications that require a low-profile, space-efficient solution. Its flat rectangular design allows for easy installation under floors, in shallow compartments, or on tight-deck layouts in boats, RVs, trailers, and mobile units.

Manufactured using rotational molding technology, the tank features a seamless, one-piece construction that provides exceptional resistance to cracking, warping, and rupture, even when exposed to frequent movement, vibration, and temperature variation. It’s built for performance in rugged, on-the-go conditions.

Constructed from FDA-approved polyethylene resin, the MW-531 complies with FDA Regulation 21 CFR 177.1520 (1) 3.1 and 3.2, making it completely safe for potable water storage.

Key Features

• 36-Gallon Capacity: Great for fresh water supply on boats, trailers, or mobile systems.
• Rotationally Molded Construction: Seamless and highly durable; resists impact and fatigue.
• FDA-Approved Polyethylene: Safe for drinking water and meets all federal potable water standards.
• Low-Profile Form Factor: Measures just 7.5" high—ideal for under-deck or floor installations.
• Marine-Ready Build: Withstands UV, saltwater, and vibration without degrading.
• Blank Tank Design: Ships without fittings, enabling custom placement of ports.
• Moderate Weight: At 55 lbs, it balances rugged strength with ease of handling.
• Made in the USA: Produced in Oregon with strict quality controls and reliable materials.
  

Specifications

• Product type: Marine fresh water tank
• Part number: MW-531
• Capacity: 36 gallons
• Dimensions: 54" L x 28" W x 7.5" H
• Weight: 55 lbs
• Material: FDA-compliant polyethylene
• Wall thickness: 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.