DGSI. Durham Geo Slope Indicator

Groundwater Remediation Pump, FAP Graoundwater remediation pump installation


Typical Remediation Installation

FAP Plus™ ZW Remediation Pump

Groundwater remediation pump with "Zero Water" pneumatic logic and AccuPos™ indicator.

Remediation Applications

  • LNAPL and DNAPL recovery.
  • Recovery of a wide range of products from light-end hydrocarbons with SSU values of 80 or lower, such as gasoline, diesel fuel, hydraulic fluids, to more viscous products like #6 heating oils. For recovering products with higher viscosities, the F.A.P. Plus™ may be used with our high-viscosity rod skimmers or our density skimmers.
  • 2" or larger wells.


The F.A.P. Plus™ ZW groundwater remediation pump (TR-51640) consists of a flexible, special inner bladder and a flexible Buna-N® hose which forms the outer pump body. The pump operates by alternately inflating and deflating the annular space between the inner bladder and the outer hose. When compressed air is applied, the inner bladder collapses. When the air is exhausted, the inner bladder rebounds to its original shape thereby causing a suction which pulls fluid into the pump and up to the surface. The pump is capable of producing a suction of 17 inches of mercury for the recovery of viscous product and operation in deep wells up to 200 feet.

See animation showing how the pump works

F.A.P. Plus™ ZW is an upgraded version of the basic F.A.P. Plus™ pump. The ZW model incorporates the “Zero Water” pneumatic logic that stops and starts the F.A.P. Plus™ ZW automatically — depending on the position of the skimmer inlet — and prevents the ingress of water when the water level rises more than the skimmer travel allows. The AccuPos™ Indicator helps locate the product/water interface level accurately which makes it easy to install the pump at the correct depth.


FAP Plus Remediation System

FAP Plus System

The F.A.P. Plus™ ZW remediation pump system comprises seven main components:

F.A.P. Plus™ ZW pump (PDF)
Skimmer Assembly
Well Clincher
Pneumatic Overfill Protection Device
Filter/Regulator Assembly
Electric Air Compressor
Hoses (not shown)


For more information

Catalog Pages (PDF, 513 KB)))
Hose selection table (PDF, 227 KB)
Air Flow and Pressure Loss table (PDF, 255 KB)
Water Flow and Pressure Loss table (PDF, 241 KB)
Animation showing how the pump works
Description of Field Installations(PDF, 1 MB)
Gallery — Field installations

Related Items

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ISO 9001:2008     C2015-01879