500mm
It's best to call Diggers Hotline (free) so they can mark the location of the various underground utility lines. They'll mark the locations (but not the depth). The depth of utility lines varies, but could be 18 inches. Natural gas lines are usually plastic and at higher pressure than at your home appliance (regulated by the gas meter).
underground
Most main lines are at least 24 inches before final grade. Drops catv/phone 4-10 in. But be sure to call in to your local one-call service to have them marked.
fathoms
faulty control valve on heater or air in the lines
there are no underground power lines but a zone holds it (power) cause the buildings need power so they hold it. and form like a circuit or you call it a underground power line.
More than likely there are already hundreds of miles of underground power lines in Lansing Michigan
Brass fittings can be used underground for water lines; always check your local code office first. They should not be used for gas lines.
More product lines
depth
Barbican station is on three underground lines. Metropolitan, Circle and Hammersmith & City.
Begin by removing the water supply lines from your Nissan heater core. Remove the heater core retaining bolts. The heater core will come out.