I have a sillcock that recently started leaking. It had started to leak a little during the spring last year (May 07). I took the stem out and replaced the washer on the end. No more leaking. I come home last night to find water leaking out thru the handle, when I removed the hose from the spout, it started to come out thru there. I believe this sillcock is original to the house, which was built in 1963. I do not know the brand or make unfortunately. I would like to replace the whole sillcock but have one big problem, my house is on a slab. All the pipes are in the wall. Can I replace the stem without have to replace the whole thing, or is going thru the wall my only option here. Any help much appreciated!