drilling

I have burned through 5 bits trying to drill into my bathroom floor in order to secure a new repair flange. The top layer is marble, which I’ve drilled through with a Tapcon carbide tipped concrete bit. Since then I have tried every type of bit: black oxide, cobalt, titanium, carbide, glass &...

I am going to need to bail out my well down to 485' from where the pump sits at 385' why it wasnt set at the bottom is up for debate. The 1 hp pump should be able to handle the additional depth without issue. It was likely a cheap out thing with the original installer, and it worked for 20...