Description
The Custom Roto-Mold 37 Gallon Marine Water Tank (Part# MW-478) is purpose-built to deliver reliable, compact potable water storage for a variety of mobile and marine applications. Its low-profile design is ideal for shallow compartments, under-bench installations, or deck-mounted layouts in boats, RVs, and expedition vehicles.
Crafted using rotational molding technology, this tank features a seamless one-piece polyethylene construction that enhances long-term durability and minimizes the risk of leaks, cracks, or structural failures. The tank is constructed with FDA-approved polyethylene resin and is compliant with FDA Regulation 21 CFR 177.1520 (1) 3.1 and 3.2, making it suitable for safe potable water storage.
Key Features
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37-Gallon Capacity. Ideal for mid-sized potable water systems in marine and RV settings.
 
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Seamless Rotational Molded Body. One-piece tank design resists cracking, splitting, and leaks.
 
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FDA-Approved Resin. Safe for storing potable water; compliant with FDA 21 CFR 177.1520.
 
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Space-Saving Dimensions. Measures 55" L x 24" W x 7" H—great for low-clearance installations.
 
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Blank Tank Configuration. Ships without pre-drilled or installed fittings for full installation flexibility.
 
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Marine-Grade Durability. UV-stabilized and resilient to saltwater exposure and vibration.
 
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Translucent Natural Color. Allows easy visual monitoring of water levels.
 
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USA-Made. Proudly manufactured in Oregon with high quality standards.
 
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Lightweight & Easy to Handle. Weighs only 49 lbs for its storage capacity.
 
Specifications
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Product Type: Marine fresh water tank
 
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Part Number: MW-478
 
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Capacity: 37 gallons
 
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Dimensions: 55" L x 24" W x 7" H
 
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Weight: 49 lbs
 
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Material: FDA-compliant polyethylene
 
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Wall Thickness: Approx. 0.25"
 
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Color: Natural (translucent white)
 
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Fittings: Blank (no pre-installed fittings)
 
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Manufacturing Location: Oregon, USA
 
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Application: Potable water (marine, RV, off-grid, mobile)
 
Shipping & Warranty
Ships FOB from Idaho (Zip Code: 83605). Freight Class: 250. Liftgate service available upon request for residential or limited-access locations.
Backed by a 1-Year Limited Warranty covering material and manufacturing defects under normal conditions.
Price Match Guarantee
If you find the 37 Gallon Custom Roto-Mold Marine Water Tank (MW-478) offered for less by an authorized dealer within 6 months of your purchase, we’ll match the price and refund the difference.
Contact: info@tanksupplydirect.com