The outer tank is formed by joining cold rolled sheet steel, used to form the sides and bottom from a single piece, with two stamped metal end pieces.
The edges between the sides and ends have sealant applied to them and are then rolled to create leak-proof seams.
A stamped top is then pressed and riveted into place to complete the assembly of the DWT.
The DWT is UL® listed in the United States and Canada under SU2258 and approved under NFPA 31 (2001) and
CSA B-139-04 as non-metallic fuel oil storage tanks.
Both inner and outer tanks are pressure tested at the factory during assembly according to UL® standards and
do not require further field testing.
The DWT also comes with a detached saddle base which the tank is placed on at the time of installation.
The tank shall be placed into service in accordance with local codes and the listed use (indoor or outdoor) on a flat,
level and stable surface, away from heat sources, corrosive atmospheres or fluids, potential mechanical damage or rapid temperature changes.
The final location must have the tank label visible after installation.
A minimum of 2" (50 mm) from all walls or obstructions is recommended for normal tank expansion and visual inspection.
The integral base support shall not be removed and
raising the tank height is not allowed except on a continuous concrete platform at least 6" (150 mm) wider than the tank base at all sides.
All local fire code set-backs for fuel oil storage tanks must be observed.
Tanks installed indoors shall not be exposed to direct sunlight on any plastic parts.
Tanks installed outdoors shall be assembled with the required cover; all tanks must be installed with an approved vent alarm
(Roth Vent Alarm #235000999, or equivalent sized UL listed whistle vent) in order to maintain warranty requirements.
-Tanks are available in sizes 110 Gallon (400 Liters), 165 Gallon (620 Liters), 275 Gallon (1000 Liters), 275 Gallon low height (1000 Liters low height), and 400 Gallon (1500 Liters).
-Each tank comes with a base, 3-3" plastic adapters and 1-metal adapter.
No other tank offers all of these features:
• Weld-free galvanized steel outer tank capable of holding 110% of the inner tank.
• Seamless high-density polyethylene inner tank.
• Highly visible optical leak alarm.
• 55% lighter than a 12-gauge steel tank with a larger storage capacity.
• Corrosion resistant steel filling system and external 2" thread, allowing for an even level in each tank when installed in groups.
• Burner feeding system consisting of a fusible link valve and check valve incorporated with supply and return port when using the optional Roth suction assembly.
• Optional Cover for outside use.
• Wide handles on each end facilitate transport and handling.
• Removable base facilitates access to tight spaces and offers greater stability.
• Compact and economical design. (8 sq. ft. for 1000 L)
• The only tanks on the market with no fittings below the oil line.
• Unique expansion system ensures increased storage capacity and faster, easier fill-ups.
• Completely sealed, every one of our tanks is pressure tested UL Listed and meets ISO 9001 quality control standards.
More for the environment:
Avoid oil spills and leaks caused by faulty pipes, couplings, or fittings, which are located underneath the tank.*
ROTH double wall tanks are designed to offer the highest level of environmental protection.
The inner portion of every ROTH tank is made of blow-molded, seamless high density polyethylene, and absolutely leak-proof and corrosion resistant.
In addition, ROTH tanks feature top connections to insure the oil stays where it should.
The outer tank is made of galvanized steel that is also leak-proof and corrosion-resistant, and can contain 110% of the capacity of the inner tank for maximum protection.
More for your safety:
Minimize the potential danger of oil spills and leaks caused by corrosion.*
ROTH tanks are completely rust-free, inside and out.
The outer tank is made of galvanized steel, roll-seamed (no welds) with an oil and fire resistant seal, making it one of the safest and most reliable tanks on the market.
ROTH uses state-of-the-art technology to ensure maximum storage safety, and minimum space requirements.
More quality:
Forget about the problems of oil odors and oil leaks.*
At ROTH, we refuse to compromise on materials or construction.
Roth tanks meet the strictest European safety standards and the most recent industry safety regulations.
Quality control of our finished product is carried out according to ISO 9001 standards, ensuring consistently superior quality.
Each tank undergoes thorough testing, including ultrasound tests to ensure optimal thickness of the plastic, and pressure testing to ensure that the tanks is sealed completely.
Roth tanks can be used for heating oil or diesel fuel.
Since 1971, more than 3 million ROTH tanks have been installed in Europe and North America.
ROTH tanks last longer than ever before due to the outstanding quality and unbeatable warranty. That is why ROTH tanks enjoy such an enviable reputation.
ROTH tanks are so reliable that we offer a lifetime protection against corrosion (inner tank), plus a limited 10-year warranty against leakage.
*See details in warranty certificate
No other tank offers all of these features:
Characteristics:
Weld-free galvanized steel outer tank capable of holding 110% of the primary tank
Seamless high-density polyethylene inner tank
Highly visible optical leak alarm
55% lighter than a 12-gauge steel tank with a larger storage capacity.
Corrosion resistant steel filling system with external 2" thread, allowing for an even level in each tank when installed in groups
Burner feeding system consisting of a fusible link valve and check valve incorporated with supply and return port when using the optional Roth suction assembly.
Optional Cover for outside use
Installation of tanks is faster and easier than ever.
Lighter: the DWT 1500 L is 55% lighter than a conventional metal tank
Wide handles on each end to facilitate transport and handling
Removable base facilitates access in tight spaces and offers greater stability for the tank
Compact design for economy of space (8 sq. ft. for 1000 L)
The only tanks on the market with no fittings below the oil line
Unique expansion system ensures increased storage capacity and faster, easier fill-ups
Completely sealed, every one of our tanks is pressure tested, UL Listed and meets ISO 9001 quality control standards
Minimum Installation Height Clearance Required 72" ()
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Capacity US gal (liters)
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400 (1500)
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Length inches (cm)
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64 ()
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Width inches (cm)
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30 ()
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Height inches (cm)
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68 ()
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Min. height required inches (cm)
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72 ()
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Tank Weight lbs (kg)
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312 ()
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Shipping Weight lbs (kg)
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330 ()
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