On Mon, 7 Sep 2009 17:10:46 -0700 (PDT), Eric Gelman
wrote:

I want to add a shutoff valve to an existing 3/4 inch copper water
line, using solder fittings. If I cut into the line and create a space
large enough for the valve, will there be enough flex in the piple for
me to fit the valve in, or do I have to use a union or some other type
of fitting?
Thanks,
Eric


Maybe, every situation is different. Generally the more length in the
pipe, the greater the flex. You may get more leeway removing a
support, etc. My last resort is using a sleave coupling, but it is an
option often used in tight places.