Different kinds of borewell flushing

Hello,

We are in the process of flushing our community borewells that have dropped in yield. The vendor tells us that there is a low cost compressor flushing with 2-3 kg pressure and a high cost flushing where the rig goes in and flushes the borewell with 20 kg plus pressure. He recommends the high pressure flushing for better cleaning. I want to understand the process better and then decide . Any advice please ?

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