On Wed, 13 May 2009 09:30:08 -0700 (PDT), Philip5malin
wrote:

I am trying to connect a washer. The washer has hot water hose and
cold water hose and a drain. The wall has a hot water faucet, cold
water faucet, drain, and an additional copper pipe 1/2 with no
faucet. What is that additional pipe for? What do I need to do with
it?

Like my setup? It's for a water softener, particularly if the pipe is
over a drain line.

My softener's discharge drain.