What are the dimensions of the 81 Gallon RV Water Tank?

The tank measures 63 inches in length, 31 1/2 inches in width, and 10 inches in height.

Is this water tank suitable for storing drinking water?

Yes, the tank is made from premium FDA-approved polyethylene material, making it safe for storing drinking water.

Can I order just one tank or is there a minimum quantity?

There is a 10 tank minimum order as this item is available on special order only.

Is the tank resistant to leaks and corrosion?

Yes, the tank features seamless one-piece construction for leak-proof reliability and is stain, corrosion, and rust resistant.

Can this tank be used for applications other than RVs?

Yes, it is versatile and ideal for RVs, horse trailers, and marine vessels.

81 Gallon RV Water Tank 63" x 31 1/2" x 10" EPI 105W Discontinued

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81 Gallon RV Water Tank 63" x 31 1/2" x 10" EPI 105W Discontinued

Name: 81 Gallon RV Water Tank 63" x 31 1/2" x 10" EPI 105W Discontinued
Brand: Elkhart Plastics/Ameri-Kart
SKU: 105W
Price: 243.16 USD
Availability: InStock
Rating: 4.5 (10 reviews)

Elkhart Plastics/Ameri-KartSKU: 105W

Added to catalog: March 17, 2020

Last product update: July 4, 2026 at 3:21 AM

$243.16 $428.57

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In stock at Elkhart RV Parts (10 units), ready to ship

Availability details

Elkhart RV Parts warehouse10 ready to ship

ERVP overstock warehouse0 available

This quantity is stocked at ERVP. See the delivery estimate below for the current expected window.

FREE Delivery Estimate July 8 – July 11

1-Hour Cancellation Window

This is a special-order item, by accepting these terms you will not be able to add to, adjust, or cancel this item once you submit your order. All sales are final and no returns or exchanges can be accommodated. Why? Because materials, vendor requests, and production scheduling begins coordination once you submit your order. With many items either “Made Fresh to Order” or fulfilled by our partners directly, you accept these terms by clicking the checkbox to the left only when you are confident this product is what you need. Read More

⚠ Please read and check the box above to accept the special-order terms before adding to cart.

Ultra-Durable 81 Gallon Fresh Water Tank for RVs, Trailers, and Marine Use

Specifications drawing for 81 Gallon RV Water Tank 63

This 81-gallon RV water tank features a seamless one-piece design made from FDA-approved polyethylene, ensuring leak-proof strength and safe drinking water storage. Its durable, corrosion-resistant construction fits RVs, horse trailers, and marine vessels, providing reliable performance and enhanced longevity. Sized at 63" x 31.5" x 10", it offers ample capacity for your water needs on the road.
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81 Gallon RV Water Tank 63" x 31 1/2" x 10"

Important: THERE IS A 10 TANK MINIMUM ORDER. This item is available on special order only. This is a custom made tank and according to current manufacturer data, there is an estimated 4-12 week production timeframe.

PLEASE NOTE: Due to this being a custom order there are no returns and no refunds.

100% Authentic OEM-Quality Parts: These rotational molded fresh water tanks are crafted to meet or exceed factory standards, making them a perfect upgrade or replacement for your RV, horse trailer, or marine vessel.

Premium FDA-Approved Material: Made from high-quality, durable polyethylene that’s fully approved for safe drinking water storage—better than many stock tanks installed in factory-built RVs.

Seamless One-Piece Construction: Engineered without seams or joints for superior strength and leak-proof reliability, outlasting and outperforming typical OEM tanks.

Stain, Corrosion, and Rust Resistant: Designed to stay clean and functional even after years of use, ensuring your water stays fresh and your tank stays dependable.

Versatile Compatibility: Ideal for RV enthusiasts, horse trailer owners, or marine adventurers looking for a long-lasting, hassle-free water storage solution.

Enhanced Durability: Built tougher than many standard factory-installed tanks, offering peace of mind whether you’re replacing an old tank or upgrading your setup.

Material	Polyethylene
Construction	Seamless one-piece
Width (inches)	31.5
Height (inches)	10
Length (inches)	63
Capacity (gallons)	81

Need Fittings Installed on This Tank?

Use our free Custom RV Tank Builder — visually place fittings, get an instant price, and order with professional installation included.

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100% Authentic OEM Parts

Factory-Fresh OEM Parts — the same brands installed in new RVs straight from Elkhart. Genuine, name-brand components made to order — never generic, never outdated. Sourced directly from the original RV manufacturers for perfect fit and factory-level quality.

81 Gallon RV Water Tank 63" x 31 1/2" x 10" EPI 105W Discontinued

1-Hour Cancellation Window