How can I detect underground or indoor leak? ...

Where can you find terry cloth bedding?
Answers:    Of what?
If it is gas - call the company, especially if in that is a smell - don't have your house blow up. Water - loss of pressure, your hose meter never stops turning or the pump is always running, showery spots, mold, ants and other bugs that like moisture popping up suddenly. Also if the house is calm and you hear dripping.
How do I paint my exterior steel front...
there's water on the f***** floor!LOL