Pex, a flexible potable waterpipe is the preferred. You can use PVC that is potable and copper that has been sleeved. No joints of any kind should be used on underground portions of the piping. That is why pex is preferred as it comes in various sizes and lengths in rolls.
A water pipe.
using a stand pipe will help a home that's built underground from getting flooded. The water will move into the stand pipe instead of going into the basement drain opening.
always use copper for any kind of water installation
With a PVC locator
Only if it is wraped pipe -- And prime and wrap fittings also and install a annode making sure your annode is lower than your pipe
Get rid of the entire copper pipe and fit 3/4 PEX from the street main into the house. Cheap and reliable.
A water pipe.
No
Underground I use K copper exclusively..
did you mean pcv? if you did mean pvc, then it depends if you want to use it for water or for waste. and if for water, how many bars of pressure will be in the pipe and for waste is underground or not. unless these questions are answered the answer to this question is vast.
underground aquifers
No, they usually break because of age of pipe and pressure from above.
using a stand pipe will help a home that's built underground from getting flooded. The water will move into the stand pipe instead of going into the basement drain opening.
purchase a threaded connector, for the PVC pipe, then purchase a metal threaded adaptor for soft pipe, see your hardware man,
Coated Copper Pipe that is approved for underground only.
groundwater
No, it is made for water only. Black iron pipe or copper are only allowed and a special plastic coated copper for underground installations.