The submersible turbine pump (STP) is only used on UST systems that have pressurized piping systems. There are several manufacturer's of STPs rated for use with petroleum and/or CERCLA classified chemicals.
STPs are typically comprised of several major component parts. These include the:
the Discharge Head
the Centrifugal Pump Motor
Riser Pipe & Pump Shaft Assembly
They are typically rated according to horsepower (e.g. 3/4 HP, 1.5 HP, 2.0 HP, etc.).
They also come in different colors designed to help you identify what type of liquid they are rated for use (e.g. gasoline, ethanol, bio-diesel, etc.).
STPs must be UL® rated, compatible with the product stored in the tank, and have a Comm 10 Material Approval for use with UST systems installed within the State of Wisconsin.