1.66″ Diameter x 18″ Length Dedicated Stainless Steel Bladder Pump Drop Tube with Screen



The drop tube intake system allows you to easily relocate the bladder pump intake way beyond the depth limitations of the pump. As Long as the pump remains submerged, you can effectively and economically low flow sample from the well’s screened section.


  • Relocate pump intake to deeper well screen interval
  • Keeps pump at optimum depth to maximize performance
  • Drop tube length custom sized to each well
  • Easily adaptable in the field
  • 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.


Pump Housing: 316 SS
Bladder Material: Virgin PTFE
O.D.: 1.66″ (4.2 cm)
Weight: 2.5 lbs. (0.93 kg)
Volume/Cycle: 10.5 oz. (313 ml)
Min. Well I.D.: 2″ (50 mm)
Operating Pressure: 10-450 psi (.7-31 bar)
Min. Operating Range: 5 psi (.34 bar)
Max. Depth: 1000′ (305 m)

Additional information

Weight 5 lbs
Dimensions 4 × 4 × 24 in


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