1 inch PVC piping at a depth below the frost line to where you live so pipe will not freeze in winter
Another opinion
I find it totally amazing how someone arbitrarily can pick a size of pipe out of the thin air. This person is totally awesome as most legitimate plumbers would ask how many fixtures you have (to calculate fixture unit demand) what type of fixtures and of course the Ph factor of water supply.
Many people refrain from using plastic especially PVC because it is highly carcinogenic and some codes out right ban its use for domestic water supply.
I wonder how one figures the friction loss and head and pressure requirements that they can put 1" PVC and not even give a schedule such as 40 or 80
No. Regardless of what type of supply line you use between the house supply and the faucet it will be a compression fitting. Copper lines with a nut and ferrule or flexible ones are both compression and do not need tape or pipe dope.
Pvc, Wirsbo, Copper, galvenized, pex, or Polyethylene
Copper used to be the main stay of house water supply pipes, however today with some homes being hooked up to private wells or the city water supply, it may be time for you to look into Plex-tubing. It is a plastic type of pipe that is ideal for older homes that are in need of a retro fit cause you can bend it very easily without the worry of a kink or crack in the line. Also some wells have high acidity and the Plex will resist corrosion. Hope this helps you.
sand or some other type of abrasive mat in water supply,
As far as I know, all kitchen faucets have the same size fitting on them. Should be a 5/8 compression. The supply maybe 3/8, 1/2 or 5/8 depending on the type of pipe in the house. You may need to get new hoses from the house pipe to the faucet. Without more information, there is no way to tell what you need.
The house air conditioning drain pipe can be unclogged using pincers made especially for that pipe. A hardware store sells a type of pincer that has a telescoping end to reach into tiny spaces to clean out debris.
More than likely you'll have to cut the supply pipe off behind the valve or loosen the large nut on the valve which would release the valve from the compression ring...then just replace the valve, if that is what you are attempting to do.
Sched. 40 PVC.
What ever the local code says is legal
There are a lot of kinds of pipe that should not be used for steam heat. If you are using steam having a pipe burst can burn or even kill people in the house. It's not something to treat lightly so you should be very careful and use pipe that is rated for both the temprature and pressure of your heating system. If you don't know then please please please call a professional. Take it from someone who has suffered through 3rd degree burns. It is so not worth a burn debridement.
That woulld depend on the piping materials and local codes as copper TYPE L , K or M should not be threaded and plastic piping should NEVER be lead wiped to a brass ferrule and Cast Iron should not be glued
You can purchase PVC and CPVC piping at any local hardware or building supply store. Plumbing supply stores are less common, but you may have one near you. Be certain that you purchase the correct primer and glue for the type of pipe you intend to use, and use the correct pipe for the correct purpose.