0.850″ Geotech Portable Bladder Pumps

Geotech Portable Bladder Pumps everything you need to quickly and efficiently sample your site

Geotech’s portable bladder pumps were designed with input from field technicians who actually do the sampling! Single turn release heads and quick change bladders have been incorporated for quick in-the -field bladder changes and easy decontamination. Custom hose barbs allow the pump to be suspended without the need for tubing clamps.


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• Constructed of 316 Stainless Steel
For unsurpassed durability and truly representative samples

• Portable turnkey systems available
Everything you need to quickly and efficiently sample your site

• Single turn release housings
No special tools or training required to service the pump

• Quick-change bladder configuration
Bladders can be easily exchanged without tools by sliding back the Teflon® collars

• Extra bladders are readily available
Available in Teflon® and Polyethylene (1.66″ pump only)

• Bonded tubing
In Polyethylene and Teflon® lined Polyethylene by the foot or by the roll

• Compatible
with the GeoControl Pro & Geocontroller II Logic Units

Geotech’s pneumatic Portable Bladder Pumps operate with a unique action, ideal for both, gentle low-flow sampling and high flow rate purging. Timed on/off cycles of compressed air alternately squeeze the flexible bladder to displace water out of the pump to the surface and exhaust allowing the pump to refill. Fluid enters the pump through the fluid inlet check valve at the bottom of the pump body, via hydrostatic pressure (automatically by submergence). The bladder then fills with fluid. Compressed air enters the space between the bladder and the interior of the pump wall housing. The intake check valve closes and the discharge check valve opens. The compressed air squeezes the bladder, pushing the fluid to the surface. The discharge check valve prevents back flow from the discharge tubing. Driven by the GEOCONTROL PRO, this cycle automatically repeats.

Compressed air does not contact the sample! The bladder prevents contact between the pump drive air and the sample.

Pump Housing: 316 SS
Pump Ends: 316 SS
Bladder Material: Virgin PTFE
Outer Diameter: 0.850″
Length w/Screen: 18 5/8″
Weight: 1.1 lbs.
Volume/Cycle: 74 mL
Min. Well I.D.: 1″
Max. Operating Pressure: 100 psi
Min. Operating Pressure: 5 psi (ash)
Maximum Sampling Depth: 200′

Ordering Information:
81150101 Bladder pump 0.85 SS24 screened
51150103 Assy bladder cartridge .85×24 SS

17200072 Hosebarb custom MOD 1/4×1/8 MPT for 1/4″ air line
17200357 Hosebarb custom MOD 3/8×1/4 MPT for 3/8 discharge
Wrench spanner BP check availability
51150115 Assy intake screened drop tube
81201003 Safety cable bracket w/loop
17200156 F, hosebarb SS6 1/2×1/2 MPT
17200233 F compression SS6 5/8″x1/2MPT

77050521 ft Tubing .170×1/4 PE-1/4*3/8 PE
77050522 ft Tubing .170×1/4 PE-1/4*3/8 TLPE
77050528 ft Tubing 1/4″x3/8″-1/4×3/8 TLPE


Weight 5 kg
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