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Solinst

Solinst 404 Waterra Pump

Solinst 404 WaTerra Pump

The Waterra Pump is a simple, reliable inertial pump that provides a cost effective sampling option for groundwater monitoring.

The Pump consists of a riser tube fitted with a one-way footvalve. It can be easily operated manually at shallow depths, or by using a surface pumping mechanism. The tubing and footvalves come in a range of sizes suitable for most well diameters and sampling applications. A 1/4" (6 mm) Mini Inertial Pump is available for sampling inside CMT Multilevel Systems (See Solinst Model 403 Data Sheet.) The Waterra Pump is a simple alternative to using a bailer. Like a bailer, the key part is the check ball which is located in the foot of the pump. As such, the Waterra Pump is often referred to as a ‘footvalve’.

404 Waterra Pump Brochure

 

Features

  • Excellent in silty/sandy environments
  • Ideal for well development
  • Operates to 200+ ft. (60+ m)
  • For 0.4" - 6" ID wells (12 mm - 150 mm)
  • Easily operated by hand
  • Efficient purging rates, and high quality samples
  • Essentially maintenance free

Solinst 404 WaTerra PumpOperation

To obtain a sample, hand-thread a footvalve onto the tubing, and then lower to the desired depth in a well or borehole. Repeatedly lower and raise the assembled tubing and footvalve approximately 6" - 12" (15 - 30 cm). A slug of water enters the tubing on the downward stroke and is retained, as the valve closes, on the upward stroke. This enables the water to gradually rise in the tubing and discharge at surface.

It is very easy to operate the pump by hand, but if preferred, Surface pumping mechanisms powered manually, or by gasoline or electricity are available. Delrin® Surge Blocks are available to fit any footvalve and well diameter up to 6" (150 mm). The Surge Block creates a strong churning effect, which helps remove silt and fine sand during well development.

Ideal For Dedication

  • Low cost - little more than a bailer
  • Reduces field time
  • Fast, easy operation
  • Avoids cross-well contamination
  • Avoids costly field and wash blanks
  • Eliminates repeated pump decontamination

VOC Samples

To obtain high quality VOC samples, use approximately 8 ft. of 1/4" diameter (2.5 m of 6 mm) sample tubing inserted into the riser tube, leaving about 1 ft. (30 cm) protruding. Develop a steady flow of water, and upon ceasing, the sample tube will continue to act as a gravity flow siphon and produce undisturbed VOC samples. To collect VOC samples, free of any contact with the air, Solinst recommends the Model 407 Integra® Bladder Pump (See Solinst Model 407 Data Sheet).