21 Gallon Custom Roto-Mold Marine Water Tank (MPN: MW-371)

Description

The Custom Roto-Mold 21 Gallon Marine Water Tank (Part# MW-371) is designed for efficient and dependable potable water storage in marine, RV, and mobile systems. With its broad, low-profile design, it fits easily into tight compartments, under benches, or within shallow storage bays—making it a top choice for space-conscious installations.

This tank is manufactured using rotational molding technology, producing a seamless, one-piece construction that eliminates weak points and resists cracking, leaking, and structural fatigue. Built from FDA-approved polyethylene resin, the MW-371 meets FDA Regulation 21 CFR 177.1520 (1) 3.1 and 3.2, confirming its safety for potable water storage.

The tank ships blank (no pre-installed fittings), allowing full flexibility for plumbing customization. Whether you're installing a freshwater system in a boat, van, or trailer, the MW-371 offers the strength and reliability you need.

Key Features

• 21-Gallon Capacity: Provides mid-range water storage for marine and RV freshwater systems.
• Rotationally Molded Construction: Seamless, single-piece body ensures long-lasting structural integrity.
• FDA-Compliant Polyethylene: Made with food-grade resin that is certified safe for drinking water use.
• Space-Saving Low-Profile Design: Measures 29.5" L x 20" W x 9" H, ideal for shallow or tight installation spaces.
• Rugged and Durable: Resists vibration, saltwater exposure, and UV radiation for outdoor reliability.
• Blank Configuration: Ships without fittings to support full plumbing customization.
• Lightweight and Easy to Install: Weighs only 27 lbs for convenient handling.
• Natural Translucent Color: Makes it easy to monitor water level visually.
• Made in the USA: Proudly manufactured in Oregon under strict quality standards.
  

Specifications

• Product type: Marine fresh water tank
• Part number: MW-371
• Capacity: 21 gallons
• Dimensions: 29.5" L x 20" W x 9" H
• Weight: 27 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

Ships FOB from Idaho (Zip Code: 83605), Freight Class 250. Liftgate service is available upon request for residential or limited-access delivery locations.

Covered by a 1-Year Limited Warranty against defects in materials and workmanship under normal use conditions.

Price Match Guarantee

If you find the 21 Gallon Custom Roto-Mold Marine Water Tank (MW-371) at a lower price from an authorized competitor within 6 months, we’ll match it and refund the difference.

Contact: info@tanksupplydirect.com