I have a tub/shower leak on the second floor, damaging first floor ceiling. I am wondering if there is a Troubleshooting FlowChart somewhere that I ca n follow. Here is the long version.
First floor bathroom ceiling shows signs of mildew. Cut the sheetrock and n oticed trace of slow leak (joist and sub-floor decolored). Checked the p-tr ap servicing the upstairs tub and changed it (it was 1/3 clogged, old iron cast, tub drains good, no signs of leak around the p-trap now).
I then re-caulked the upstairs tub as I saw signs of water at the base of t ub (close to drain side).
Here is what I mean by troubleshooting flow chart....
1- If p-trap is leaking, then replace/repair, done. 2- If tub is not sealed, then re-caulk, done. 3- If leak happens when tub/shower is not used, then check supply lines 4- If leak happens when shower head is running, then check diverter and/or shower head connections 5- If leak happens when down spout is running, then check diverter and/or d own spout connections 6- If leak is on the cold side, then check cold valve stems 7- If leak is on the hot side, then check hot valve stems 8- If all fails, scream help, kick the tub, declare life is not fair, etc
Something like that...
One specific question, if the valve stems are bad, would they leak behind t he wall? Or only if the packing nut is lose?
From what I understand, if stem seat, o-ring, washers are bad, water leaks into the tub. But what would make the water leak behind the wall? Would tha t be the packing assembly?
Is there a book called "plumbing for dumb software engineers" :-)