Bore rehabilitation methods

Gents + 1

my water bore at home has nearly given up the ghost. I dont know much about it except that it has a 40mm HPDE pipe concreted (at the top) into a 65NB steel liner. And its old. No idea of the depth
I cannot extract the HDPE pipe because of the concrete, and if I did, I may not be able to get it back in.
The bore is slightly artesian;overflows very slowly at zero load. However if I pump it, the pressure drops to around 7m lift which is all the pump can do. Pumped, I guess the current yield is around 5 lpm; used to be about 30 lpm.
I suspect the screen is blocked and am wondering about trying a backflush, with either compressed air or water, ot try and clear it. Any ideas/references?
Cost of a new bore is $10,000 with no guarantee of water.

Cheers

Steve Received on Tue Jul 06 05:04:00 2004