While researching various ways to drill for water I discovered this interesting video demonstrating how one can build a hand drill form plumbing parts and drill for water to substantial depth. This method allows manual drilling for water to depths up to 100m for 3 to 4 days, while the 30m mark can be reached on the first day. While this drill cannot penetrate hard rock and the encounter of larger stones will certainly obstruct the drilling, it is a very cheap method to drill for water and it will work for almost any type of soil.
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