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300 Gallon Ace Roto-Mold Black Doorway Tank

also called slimline tank, wall tank, closet tank, freestanding tank
300 Gallon Black Doorway Tank
Images may be inaccurate. See specs table below to ensure accuracy.
Quick Summary
Part# MPN: SP0300-UTB / Store ID: X9472430
Dimensions 62" Length x 29" Width x 53" Height
Liquid Access 1 Outlet , 1 Manway / Lid
Weight / Ship Class 159 lbs. / Ship Class 250
Ships From IA
Drawing Ace Roto-Mold SP0300-UTB Drawing
Made with FDA approved resin - 100% potable and safe for drinking
Complies with U.S. FDA regulation 21 CFR 177.1520 (1) 3.1 and 3.2
Black color reduces algae growth in direct sunlight
Used for water or chemical storage
Small size allows for portable / utility use

6-8 Week Lead Time

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Regular Price: $1,104.99

Special Price $865.99

22% Off MSRP Guaranteed for 6 days only



Ace Roto-Mold / Den Hartog 300 Gallon Doorway Tank, part# SP0300-UTB, is a black plastic slimline tank designed to maintain a minimal profile. It can be used as both a portable utility tank or a doorway tank. Ace Roto-Mold manufactured this slimline tank for residential and commercial liquid storage use. It's slender design allows it to fit through conventional doorways and freely stand without the need of supports or stands. This tank is commonly used for chemical storage, water storage, irrigation, rainwater collection, gardening, fire protection, and liquid transportation. As a doorway tank, it's often placed against walls in garages, gardens, patios, and around the sides of buildings or homes.

This tank is constructed with high density polyethylene resin that is FDA approved, food-grade, and safe for drinking. The slimline tank has a seamless design that makes it durable and resistant to chips, cracks, and environmental damage. It was designed to be weather resistant. It's polyethylene resin contains UV inhibitors for protection against sunlight, making this tank ideal for indoor or outdoor use. The tank has a 1.7 specific gravity rating and can be used for potable water storage or chemical storage. It complies with the U.S. Food and Drug Administration regulation 21 CFR 177.1520 (1) 3.1 and 3.2 for the storage of potable water. It also meets ANSI / NSF 61 standards.

A 300 and 400 gallon size of this slim tank is also available. These doorway tanks contain gallon indicators for easily identifying liquid levels. This Ace Roto-Mold plastic doorway tank is equipped with a 16" vented manway and a 1-1/2" female NPT bulkhead fitting. This plastic tank contains top and bottom flats on both sides for the installation of additional fittings. It comes with a 3 year manufacturer warranty.

The National Tank Outlet is ready to fulfill your water and chemical storage needs with this 300 gallon poly doorway tank from Ace Roto-Mold / Den Hartog. Contact us for questions, customization options, and more information.
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Size Comparison

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At Scale

Additional Information

Store ID X9472430
Manufacturer Info
Product Part # SP0300-UTB
Manufacturer Ace Roto-Mold
Manufacturer Warranty 3 Year Warranty
Technical Drawing Ace Roto-Mold SP0300-UTB Drawing
Size Info
Capacity (Gallons) 300
Dimensions 62" Length x 29" Width x 53" Height
Weight (lbs) 159
Liquid Accessibility
Liquid Access 1 Outlet , 1 Manway / Lid
Outlet / Drain 1 1-1/2" PP Female NPT Bulkhead Fitting
Manway / Lid 1 16" Threaded Vented Manway
Resin Features
Color Black
Material Polyethylene
FDA Approved Resin Yes (Food Grade, Potable)
UV Inhibitors Yes
Translucent No
Max Temp Allowed 120° F / 48° C
Physical Features
Product Type Doorway Tank
Specific Gravity 1.7
Tank Shape Rectangular
Tank Usability Stationary
Environment Above Ground
Gallon Indicators U.S. / Imperial & Metric
Pressurized Use No
ANSI / NSF 61 Approved Resin Yes
Shipping Info
Shipping Locations Iowa
Shipping Zip Codes 51238
Ship Freight Class 250
Liftgate Option Yes
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