The answer depends on the flow rate or the water pressure, not just the pipe size.
If the line is outside, sloping will prevent the risk of freezing/braking if there is not water in the line! Inside, it just prevents risk of drips and bacteria growing in what could be stagnant water.
natural gas line
0.00000288 L at 4 degrees C, and 1 atmosphere
A pipe does no water. Te capacity of the pipe with the given dimensions is approximately 98.2 US gallons. Whether or not the pipe holds any water is impossible to say.
always use copper for any kind of water installation
A water pipe.
When the handle is in line with the pipe, the valve is open.
Supply coming from water source is a water service line.
Yes, be sure to pipe floor drain line properly into water closet piping.
yes any pipe will
Not being able to see the pipe and not knowing where it is, it's kind of hard to know. If it is a cold water line and you have not shut off the hot water tank, the pressure from the hot water will back flow and hot water will come out of the cold side.
To raise the height of an outdoor water faucet, the best thing to do would be to get an extension for the existing pipe that will bring the faucet to the height desired. Remember to turn off the source of the outdoor faucet before starting this project. Remove the faucet valve, screw in the new pipe, replace the faucet valve. Sealing the ends of the new pipe with plumber's tape is also a good idea.
Repairing the section of pipe that is leaking will stop a leak on a hot water line.
because the pipe line broke
By installing a "TEE"
A standard water line PVC pipe typically has a width (diameter) of either 1/2 inch, 3/4 inch, 1 inch, or 1.5 inches.