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Section 4Ancillary Equipment

Section 4 Ancillary Equipment DefinitionDispensers & Under Dispenser Containment Vapor RecoveryDrop Tube & Fill PortSubmersible Turbine Pump ( STP ) Sump & Sensors

Section 4 Definition Ancillary Equipment Any devices, including, but not limited to, piping, fittings, flanges, valves, and pumps used to distribute, meter, or control the flow of regulated substances to, and from, a UST.

Ancillary equipment is any devices, including but not limited to, piping, fittings, flanges, valves, and pumps that are used to distribute, meter, or control the flow of regulated substances to, and from, a UST.Section 4 Dispensers Ancillary Equipment Fill NozzleShear ValveProduct PipingVapor PipingUnder Dispenser Containment (UDC )

Attached to the dispensers, there are many components. These components include fill nozzle, shear (or impact) valve, product piping, vapor piping, and UDC. The UDC, or under-dispenser containment, is a form of spill prevention designed to contain any product that is leaked from the dispenserSection 4 Vapor Recovery Ancillary Equipment Captures vapors that are displaced during product deliveryCoaxialDual Port

Vapor Recovery Systems are designed to capture vapors that are displaced during product delivery. The two types of vapor recovery are coaxial and dual port.

A coaxial vapor recovery system is basically a tube within a tube. During delivery, the product enters through the inner tube and the vapors exit through the outer tube.

A dual port vapor system consists of two separate openings, a fill port and a second opening dedicated to the release of vapors. Two separate hoses are required for dual port deliveries.Section 4 Drop Tube and Fill Port Ancillary Equipment Access for product to enter tankCatchment Basin (Spill Bucket)Drop Tube

Drop tubes and fill ports are access points for the tank. The fill port is surrounded by a catchment basin, or spill bucket. Spill buckets are designed to contain any product that may leak during delivery.Section 4 Submersible Turbine Pump Sump & Sensors Ancillary EquipmentPressurizedLocated above tankPotential leakContainment sumpsSloped Pipe with annular spaceContinuously monitored sump sensor

A submersible turbine pump is located above the tank. It is pressurized and therefore has the potential to leak. In newer systems, containment sumps are used to capture any product that may be leaked from the submersible turbine pump. Submersible turbine pumps can also be used to contain and detect leaks from double walled piping. Submersible turbine pumps are usually equipped with an electronic monitoring system, or sump sensor, that will sound an alarm if product and/or water is present in the sump.