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The WaTerra Pump is a simple, reliable inertial pump which uses an age-old, proven technology, in an elegant manner uniquely adapted to the needs of modern groundwater monitoring.
The pump consists of a riser tube with a one-way valve at the foot and a surface pumping mechanism. The valve allows water to enter the tubing as it is pushed downwards, and retains the water when the tube is pulled upwards again. The inertia of the water itself provides the force to carry it up to the surface whenever the tube is being pumped up and down. The water travels in a continuous column, with little disturbance, thus retaining volatiles.
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To obtain a sample the tube and foot valve are lowered to the desired depth and rapidly pumped up and down, either manually or mechanically. The lightweight WaTerra Pump Handle is used for manual pumping, and is very inexpensive and highly portable. This makes it excellent for use in remote locations. The electric or gasoline pump control units are ideal for larger volumes of water, higher pumping rates, and longer time periods. All provide excellent well development, and efficient purging and sampling of monitoring wells.
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