I'm going to install a new tub/shower valve (Moen posi-temp) in place of my non-balanced pressure 30 yr old Moen valve. The bathroom walls are opened up to the studs. The way the old, existing copper piping was roughed-in seems kind of bush leauge. I'll try to explain.. the bathroom is on the 2nd floor & the bathroom that I'm redoing is back to back to a 2nd hall bath on the 2nd floor. So, the copper pipe comes up from the lower level, through sole plate of the interior wall, extends up ~ 12" from the floor, & the starts running horizontally through wall studs. When it gets to the tub/shower valve, the copper piping runs up to the valve, and then about 12" of water hammer piping runs up from the valve & dead heads. IOW, the valve is feed from the bottom. In additon, the cold water supply is Tee'd to supply water to the toliet in the bathroom on the other side of wall. Finally, there is a 1-1/2" vent pipe in the same stud cavity as the shower valve, Bottom line, very hard to unsolder old shower valve & solder in new valve.
What I want to do is solder in copper pipes into the new valve going up, eliminate the water hammer pipes, run to the next stud cavity, come back down, & connect into the existing plumbing. I would have enough "swing" in the new pipes to connect to the existing piping. Further, both water supply pipes would effectively be above the shower head. I would think this would stop the whistleing sound I got with the old shower valve & plumbing.
So, I would basically be feeding the shower valve from the top down, rather than from the bottom up. Does this sound correct? Does it even matter?
All of you guys have been really great in answering my earlier questions.
Thanks very much, FJK
What I want to do is solder in copper pipes into the new valve going up, eliminate the water hammer pipes, run to the next stud cavity, come back down, & connect into the existing plumbing. I would have enough "swing" in the new pipes to connect to the existing piping. Further, both water supply pipes would effectively be above the shower head. I would think this would stop the whistleing sound I got with the old shower valve & plumbing.
So, I would basically be feeding the shower valve from the top down, rather than from the bottom up. Does this sound correct? Does it even matter?
All of you guys have been really great in answering my earlier questions.
Thanks very much, FJK