The other note is to make the most of this and any opportunity to upgrade the system, i.e. adding isolation and drain valves and shock absorbers to the piping. The absorbers are particularly important for washing machine feeds as they have quick closing valves that tend to promote water hammer.

: I live in a house on a slab foundation. A leak has developed in the form of seepage coming out of the
: garage (concrete) floor very close to where the washing machine is. My question is what are the
: pro's and con's of rerunning the hot water pipes through the attic instead of tearing into the foundation to
: repair the leak.