The shower may be leaking from: 1) A failure of the drain and associated piping itself (e.g., corrosion of the cast iron floor drain), 2) A failure of the shower pan, which is an ostensibly waterproof liner (may be metal or synthetic polymer) embedded in the tile floor (or comprising the plastic floor) which is mechanically connected to the drain; or 3) Leakage of water in the shower's surrounding area (walls, non-pan floor area, etc.) which is accumulating and dripping near the drain.
The shower diverter is loose or broken inside and needs to be changed.
The drains for the shower, toilet and sink all connect to a common line. Assuming the toilet is not backing up, the problem indicates that there may be a partial blockage, enough so that some of the toilet flow is backing up through the shower drain line. You need plumbing repair. The shower leak you mention should only be in the shower, or else you have a broken drain line as well.
usally a line stoppage
A drain leak, a leaking shower pan, a leaking shower valve or piping, a leaking bezel or escutchions on the shower valve, bad or missing grout, bad caulking in the corners of the wall, a leaking shower door, water spilled on the floor, or, a drain pipe leak. any one or combination of the listed problems can do it. Look things over take care of what you can see wrong before making a hole in the ceiling. If you think you have fixed the leak repaint the stained area but prime 1st with Kilz or Binz to cover the stain or it will reappear through the paint even if the leak has stopped. If the leak hasn't stopped from taking care of the things you could see then open up a hole to see where it is coming from.
Shower drain goes into a trap under shower. Continue piping from trap to drain line.
There are many things that can cause a shower faucet to leak. Some of the most common reasons for this are poor quality washers, washers are the wrong size,loose nuts, build up of residue on the faucet inlet.
Water won't drain from shower. Either trap or shower drain line is clogged.
First thing you should do is call a plumber. Drain lines are not supposed to leak. Your drain line is clogged and needs to be snaked out and the leaking pipe repaired.
plugged evaporator drain tube or the heater core has gone bad
First put a stooper in the drain, then take a 5 gallon pail of water fill the base of the showe let it stand over night and see if anything leaks ( GET THE WATER FROM AOTHER PLACE NOT FROM THE SHOWER) The next day let the water drain this should let you know if it the shower pan /drain pipe. If not leaks then test the grouting by hahing water spashed on it THEN ids still no leak we can explain how to test the shower valve Sylvan Tieger,LMP
Check you vent stack connection inside the house. Gurgling may have been caused by a clogged vent stack not equalizing the pressure. Now that gurgling has stopped it is getting air. Start your checking there. ----HYPOTESIS The shower drain in a spare bath gurgled when the toliet flushed or the sink water drained When the shower was used it leaked to the ceiling below. Now it does not gurgle -How do we find the leak?
A leaking gasket, a leaking filter, or a leaking drain plug....