0.85″ Diameter x 24″ Length Dedicated Stainless Steel Bladder Pump



Together with the USGS, Geotech designed the original bladder pump for groundwater quality and pollution monitoring. They can pump to the surface from as deep as 1000 feet (305 meters) with minimal agitation for the best representative samples.


  • True low flow capability for less agitation
  • Proprietary resin grade virgin PTFE bladder for long life
  • Constructed of #316 SS for durability
  • Dedicated or portable turnkey systems
  • Designed for wells as small as .75″ (1.9 cm)
  • Screened intake extends bladder life
  • Optional Drop-Tube assembly available for sampling from greater depths
  • Limited lifetime warranty on dedicated stainless steel systems


A. GEO1.66SS36
Made from SS for maximum durability. Highest volume rate for a low flow pump. For 2″ (5 cm) wells or larger.
B. GEO1.66SS18
The same as above but for lower pump volume requirements.
C. GEO.85SS24
Made from high-grade SS for maximum durability.
Extra slim design provides excellent performance for its size.
D. GEO.675SS
Our smallest bladder pump, fits in any well .75″ (1.9 cm) or larger. Made with the same polished stainless steel as our other top-of-the-line pumps


Pump Housing: 316 SS
Bladder Material: Virgin PTFE
O.D.: 10.85″ (2.2 cm)
Weight: 1.6 lbs. (0.60 kg)
Volume/Cycle: 2.1 oz. (59.6 ml)
Min. Well I.D.: 1″ (2.5 mm)
Operating Pressure: 10-450 psi (.7-31 bar)
Min. Operating Range: 5 psi (.34 bar)
Max. Depth: 250′ (76.25 m)

Additional information

Weight 3 lbs
Dimensions 4 × 4 × 26 in


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