ALL YOU NEED ON THE BENCH IS A SMALL AIR COMPRESSOR WITH A HOSE TO GET AIR TO THE COLLAR OF THE HOLE. 


aIR pressure IN THE RANGE OF 60 TO 80 psi WILL EXPAND THE SLEEVE,  SEAL THE HOLE AND EXPELL THE WATER IN SECONDS.

Nothing mechanical in the hole, just the expandable rubber sleeve


The entire lightweight body and sleeve assembly, with the intake hose suspended below, is lowered into the blasthole to the water level.  Compressed air is used to inflate the sleeve, thereby expanding it to form a seal against the inside wall of the hole.  Pressurized air is then automatically diverted out the bottom of the rubber bladder into the closed chamber which has been created below the sleeve.  This air pressure displaces the water and forces it into the intake line, up through the center of the pump body, and on out the discharge hose to the surface.  Because this action occurs within seconds, the volume of compressed air flowing into the hole is used to displace and lift the fluid from the hole, rather than to force it back into the surrounding material.  After the water in the hole is removed, the pump is immediately withdrawn. The dewatered hole can then be primed and loaded with the appropriate explosives.

Old dewatering videos showing a variety  of projects with different hole sizes

The pump is available in a complete range of sizes to dewater holes from as small as 2-1/2" (63mm) in diameter,  thru holes in the 7" (178mm) range, to depths approaching 130" (40m).

Contact us to discuss your situation or place an order

Ph: 406 654 1727    email:   7pkunze@mtintouch.net

Box 1160   Malta, MT 59538  USA