Underground Petroleum & Chemical Options and Accessories

Alarm Control Panels        

Alarm & Control Panels

Highland makes available a comprehensive selection of standard and custom panels for fuel and/or water leak detection and level sensing. Panels are available with visual and audible alarms. 


Compartment Tank

Compartment Tanks are designed to store multiple grades of product, or different types of products, in the same tank. This safe, economical alternative allows you to create multiple fuel storage compartments without having to install separate tanks for each product. They are available with single or double bulkheads and are ideal for storing multiple grades of gasoline. Diesel and biodiesel blends can be stored in the same tank. Advantages include easier installation, requires less space, reduced shipping, excavation and insurance costs.


Thermal Fluid Heaters

Electric, steam or hot water heating systems provide temperature control for heat-sensitive fluids to aid with product quality and consistency.


Fittings & Connections

Standard NPT fittings as well as many types of flanged fittings are available to meet your specific project needs. Standard steel pipe sizes    from .125" to 6" nominal diameter and flanged connections up to 48" diameter are available.

Grade Level Manways

Grade Level Manways

Designed to AASHTO H20 requirements, each manway is constructed of A36 steel plate from 10 ga. To 1/4" thick with lids if 3/8” reinforced checkered steel plate.  Round GLMs are available in widths from 48” to 72” and lengths from 48” to 150”. Download brochure.


Hold-Down Straps

These are designed to secure tanks in areas where high water levels may result in flotation.  Hold-Down Straps are available in four different designs to accommodate specific installation requirements: Standard Steel, Safety, Deadmen and Polyester. Download brochure.

 Highland Polyester Hol Down Straps


Polyester Hold-Down Straps

Designed to work with Highland's Concrete Deadmen Anchors, they help secure tanks in areas where high water levels may result in flotation. Easy to install, they attach to anchors with steel cable and turnbuckle systems. Download brochure.

Polyester Hold-Down Straps are available for tanks up to 10'-6" diameter. Steel straps are available for tanks above 10'-6" diameter.


Concrete Deadman Anchors

Deadman Anchors help secure underground tanks at installations where there is potential for high water. They are designed to be used with our Hold-Down Straps on our standard tanks from 500 to 50,000 gallons. Download brochure.

Leak & Level Sensors

Leak & Level Sensors

Leaks are prevented by a wide variety of sensors used to detect leaks or liquid levels. 


Manways, Extensions and Tank-Top Sumps with Double Ring Manways

Manways provide access to the tank and include a bolted cover and gasket.  The cover provides a convenient location for fittings.  Extensions and Tank-Top Sumps with Double Ring Manways are project specific. 

Stackable Risers

Field Adjustable Manways 

Stackable adjustable manways are avilable in 24" diameter, 38" high with lid, safety screen and access ports. Multiple size sections can easily be adapted in the field to meet site elevation needs.


Tank & Vessel Head Design

Tank & Vessel Head DesignsStandard Flat-flanged Heads are commonly used in applications where the tank will be operated at atmospheric pressure.  Standard Flanged & Dished Heads are used when applications require slightly higher operating pressures.ASME Semi-elliptical Heads heads are engineered, and manufactured for superior performance where specific pressure conditions exist.