Unity Fuel Solutions – BLOC Dual Fluid Tanks

Unity Fuel Solutions’ Dual Fluid Tanks are the best solution for the storage and dispensing of Diesel and Diesel Exhaust Fluid (DEF) – from 638 to 1,153 gallons.


They offer a flexible, safe, and integrated dual fluid storage solution and streamline your fuel dispensing and management. A practical design ensures a fast, easy and convenient installation in any location, indoors or outdoors.




These mobile and modular units ensure fast and easy transportation to site, are easily relocatable and require minimal site works or preparation. A place-fill-and-pump installation process offering versatility and speed on commissioning.

The freestanding design allows for 360° tank viewing and inspection. External steel tank shell and internal stainless steel DEF tank construction with an internal thermal insulation and high-grade paint finish ensures longer durability of both tank and product in the elements.

Our double-walled tanks are designed as integral secondary containment and therefore do not require independent bunds for leak containment. Double-walled tank = SFL primary tank + interstitial space + secondary external tank.


  View/Download Unity Fuel Solutions BLOC Dual Fuel Fluid Information Brochure pdf.


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  • Meets UL-142, ULC-S601-14 and  UN-31-A/Y compliance as standard.
  • Double-walled tank construction consists of an inner 5mm primary diesel tank with 3mm outer secondary steel tank.
  • DEF tank constructed from grade 304 stainless  steel and lined with thermal insulation barrier.
  • Baffled internally to reduce product movement should the unit be moved with contents.*
  • Both tank manways accessible and removable for internal tank maintenance and cleaning.
  • Diesel manway – Recessed spill box/pump cabinet with pump mounting bracket.
  • DEF manway – Easy access for pumping equipment.
  • Both tank manways housed under heavy duty lockable lid for additional fuel security.
  • Sectional cut-outs on sides of manway spill box to allow flexible hoses/pipework to external requirements (i.e: generators).
  • Curved roof feature for water drainage to top of tank.*
  • Diesel tank complete with aluminium gauged dipsticks, 1 x galvanized updraft vent breather system and multiple port fittings.
  • DEF tank has provision for tank gauges and pressure vacuum vents.
  • Air pressure tested prior to leaving our factory.
  • Mobile and modular design allows for ease of transportation.
  • 250-300 Micron thickness ‘WHITE’ paint finish as standard.
  • DEF and combustible liquid safety labels and decals supplied as standard.
  • Forklift pockets and certified tie-down/lifting points at
    each corner.


*Conditions apply. Some features standard, some optional extras, depending on product range. Custom colors, coatings, dimensions and refueling equipment packages are available upon request.


Additional Information




  • 2 x 1” Spare Ports (NPT)
  • 1 x 1.5” Spare Ports (NPT)
  • 1 x 1” Probe Ports (NPT)
  • 1 x 2” Suction Ports (NPT)
  • 1 x 2” Fill Point
  • 1 x 1.5” Gauge Point
  • 1 x 2” Vent Port (BSP)
  • 1 x 2” Spare Socket (NPT)



  •  x 2” Interstitial Dip / Vent
  • 1 x 2” Suction Port (BSP)
  • 1 x 4” Submersible Pump Provision (BSP & NPT)
  • Forklift pockets, certified tie down / lifting points at each corner.
  • Tanks can be stacked 4 high empty and 2 high full.

Unity BLOC Dimensions and Weights

For more detailed information or to purchase from Loftin Equipment, please call 800-437-4376 or by email tanks@loftinequip.com