"Tim" writes:
Is a 1" copper union slip x mips commonly available?

They are Nibco series #733-4, all they way up thru 2 1/2"
size.

http://www.nibco.com/assets/coppercat.pdf

That looks like EXACTLY what I need.

But you're going to have to visit a real supply house.


If it is a special order at the plumbing supplier, McMaster-Carr
will ship and have it at your door the next day.

http://www.mcmaster.com/

Item #: 5520K13

$3.90

That part seems to be just a straight fitting and not a union:
Socket-End (Female) to Pipe (Threaded) Adapters

My search of the McMaster-Carr catalog only turned up unions with a
female threaded end and not with male threaded ends (which is what I
am looking for).

That being said, thanks for the McMaster reference...