Waterra Surge Blocks are simple but highly effective accessories for developing, surging, and cleaning out groundwater monitoring wells. Tough thermoplastic rings that press fit directly onto either a Standard Flow D-25 or High Flow D-32 foot valve, Waterra surge blocks work by increasing the foot valve’s outer diameter to leave only a minimal annular gap between the valve and the well screen — dramatically amplifying the surging action with each pump stroke.
The Waterra well development system simultaneously surges and pumps the well, Waterra making it one of the most efficient methods for loosening and removing fines, drilling fluids, and accumulated sediment. Two surge block sizes are available for each flow system, covering both 2″ and 4″ schedule 40 monitoring wells. Note that surge blocks, foot valves, and tubing are sold separately.
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