Yield Testing

The driller normally provides the client with a blow yield. This yield is often mistakenly used as the sustainable yield of the borehole, resulting in the incorrectly sized pump being installed into the borehole, THE CORRECT METHOD is used by borehole water being pump constantly on it's own measuring the water quantity in an hour. Normally this process can take up to 2 hours, but in some cases a 6 hour yield is required