Or can I use a regular 90 deg elbow?
Also, I've been trying to figure out what kind of shot-off valves to use for the toilet and sinks. I'm assuming an angle valve but not sure which ones are for what type hoses. Do I need to stub out with a threaded nipple that the valve screws onto? Jeeez, so many questions for something that seemed so easy before I started finishing my basement.:confused:

Angle stops are used when the pipes come out of the walls. Straight stops are used when the pipes come up through the floor. They are just what the name implies, straight or angled. They are available as compression fit, where a compression ring and nut are used to make the connection, sweat or soldered fit, where the valves are soldered onto the copper pipe , threaded fit where they are screwed on to the end of a threaded pipe or fitting. Then there are the CPVC for plastic or CPVC pipes. If you have copper pipes the most common type used are compression fit, easiest to replace. Most often the input is 1/2" pipe and the output is 3/8" tubing.

The drain is usually stubed out of the wall in the center of the space. Angle fittings can be used if necessary to point to the lavatory drain if necessary, but Tom frowns on 90 degree turns. They ten to cause blockages, can't think of a situation where a 90 ell would be required. If you question is what to use inside the wall, usually a regular 90 ell is used to turn down or into the piping. A long 90 or sweep would be nice but may give you problems finishing the wall around it

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Tom frowns on 90 degree turns. A long 90 or sweep would be nice but may give you problems finishing the wall around it

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And space is the reason that we use a regular 90 instead of a long sweep to turn out of the wall into the stubout. Harold nailed it again.

So if I just stub 1/2" copper out into where the cabinet will be and leave plenty to cut off and put on the valve later I should be OK right? Then I just cut off any excess and sweat the valve on after the cabinet is in place right? Guess I'll need an escutchon or cover plate of some kind too.

Oh yeah. I built the wall with 2x6's so the wide sweep 90 deg. Works OK I think. At least now I know I can use the regular 90 if I need to. Thanks guys.
Dave