A leaking shower has three usual culprits: a tired cartridge, a split supply pipe inside the wall, or a pan that has stopped holding water. Only the cartridge is a cheap fix. Close the shower's own stop valve, or the main valve if the shower has none, then phone a plumber. Moisture trapped behind the tile rots the framing and drips into whatever sits below, so waiting for it to dry out is a bad bet. It is part of the wider faucet, sink, shower and disposal guide and deals with leaks, bursts and weak flow at the shower.
What do I do first if a shower pipe bursts or leaks?
Stop the supply. Find the valve nearest the shower, or failing that the main valve at the point where the water line comes into the house. Next, let the pressure bleed off through a tap on the ground floor, clear valuables from near the wall and take photos of what you see. After that, ring a plumber. Keep the shower off until the repair is done.
Water showing up on a ceiling below is a different risk. Flip off the breaker for the lights in that room before standing under the stain, because wet wiring is dangerous. Soak up pooled water, point a fan at the spot and leave the area open so it can dry. We cover shutoff and cleanup step by step in what to do with a burst water pipe, and the quieter cases are handled in spotting a burst pipe when it is quiet.
How can I tell if the shower leak is a burst pipe or just a worn part?
Look at where the water appears. Drips from the showerhead, a handle that will not fully close, or a trickle at the tub spout all suggest a worn cartridge or washer, and you can see them. Damp drywall, a ceiling stain downstairs, hissing from inside the wall or a bill that keeps creeping up all suggest a pipe leak, which you cannot see.
Here is a quick test. Close every tap and appliance, then read your water meter. A dial that keeps turning means water is going somewhere. Burbank Water and Power runs an advanced metering system with leak alerts, so ask the utility whether alerts are active on your account; the customer service number is on their site. On the billing angle, see reasons a water bill jumps and high water bill with no visible leak.
What causes a shower pipe to burst or leak behind the wall?
Supply pipe wears out at its joints. Pressure that runs too high stresses fittings, and a connection that was never tight can slowly back off. Plenty of San Fernando Valley houses built between the 1940s and 1960s still carry their original galvanized or copper lines, and those tend to pinhole at elbows and valve bodies. Mineral scale adds to the wear, and a quake can nudge a fitting so it starts to weep later.
Pinholes in aging copper are common. One published example prices a pinhole repair on half-inch copper at around $150, though access decides what a plumber really charges. Two or more leaks inside twelve months means the line is on its way out, and the talk shifts from patching to a repipe or replacement decision. A good plumber will raise that with you openly.
How much does a plumber charge for a shower leak?
Nationally, a shower repair runs roughly $238 to $595, with the cheapest jobs near $122 and the dearest past $1,100. A dripping faucet or valve lands at about $150 to $500 depending on how bad it is, and a burst pipe averages $234 to $771. Read these as ballpark numbers. Your real price comes with the written quote after someone has seen the job.
Three things move the number: if the wall must be cut open, the pipe material, and how much tile, drywall or ceiling below got damaged. Plumbing labor and wall restoration are normally billed apart, so ask for each on its own line. Pricing across all leak types sits in what a plumber charges for a leak repair.
Why is there no water pressure in the bathtub when the rest of the house is fine?
A weak tub or shower beside normal flow everywhere else means the fault sits close to the fixture. Likely causes: a blocked showerhead, a bad cartridge or diverter, and a stop valve that is only partly open. Scale and leftover debris from earlier pipe work clog the tiny passages, and the same thing can starve one bathroom sink.
Start by taking the showerhead off and leaving it in vinegar to eat the scale. Next confirm the stop valves under the vanity and behind the tub access panel are open all the way. Pressure that dropped just after plumbing work often points to debris stuck in a cartridge. For descaling steps see removing hard water scale, and for a house-wide problem go to low water pressure.
Why did the water pressure in my bathroom sink suddenly drop?
One sink going weak overnight is most often a clogged aerator or a half-shut stop valve. Twist off the aerator at the faucet tip and rinse the grit out. If it is clear, look at the small angle valves below the basin and turn them fully open. A kinked supply hose, or one with sediment inside, can also throttle the flow.
When only the hot side is affected, look at the water heater or its shutoff rather than the sink. When the entire house loses pressure at once, phone the utility and ask whether crews are working on the main. Burbank Water and Power lists a water quality number you can call if the change comes with a strange taste or color.
When is a leaking shower an emergency?
Treat it as urgent when the flow will not stop, when water seeps through a ceiling, or when it reaches an outlet or light fixture. Shut the main, switch off the breaker serving the wet area provided the panel is dry and easy to reach, and get a plumber out immediately. A showerhead that drips slowly is no emergency, yet it deserves a fix within the week.
After a burst, people ask about coverage. What a policy pays hinges on the cause and the exact wording; our page on burst pipe insurance cover lists the usual questions. Take photos before you clean up. To book a plumber, use our quote page, or browse everything we arrange from the Lankershim Plumbing home page.
Questions people ask
What is the typical duration of a shower leak repair?
Swapping a cartridge or valve is usually an hour or two of work. A split supply line in the wall takes more time, as the plumber opens the wall, removes the damaged length, fits new pipe, pressure tests it and closes up. Tile and drywall work belongs to another trade and often needs its own visit. Expect a time estimate when the plumber looks at the job.
Which questions belong in the quote conversation for a shower leak?
Ask how the source will be located, if the quote includes cutting into the wall and closing it again, and who will redo the tile. Request the contractor's California license number and look it up on the state's License Check page. Quotes that split plumbing from wall repair are simpler to compare.
Does someone need to stay home during the shower repair?
Be home at the start, so you can point out the shutoff valves, and again at the end to test the shower and approve the work. In between you can leave the plumber to it. Take towels and toiletries out of the bathroom beforehand, and mention any damage the leak has caused in other rooms.
Can a leaking shower cause mold?
Yes. In warm weather a damp wall cavity can start growing mold within days. Repair the leak first, dry everything out, and get a professional to look at any wall that stayed wet for more than a day or two. Light mold on grout lines is something you can clean. Mold inside the wall needs a specialist.
Is a shower pan leak a plumber's job?
Often it is. A leak at the pan or the drain connection beneath a tiled shower counts as plumbing, although locating it may take a flood test, where the plumber plugs the drain, fills the pan and watches the water level. Fixing the pan can also call for a tile setter, so ask for the two jobs to be priced separately.
References
- Thumbtack, shower repair cost guide (national averages)
- Thumbtack, pipe repair cost guide (leaking pipe, pinhole leak examples)
- Burbank Water and Power, Chloramine Boosting System page (water quality statement and contact)
- Burbank Water and Power, home page (customer service number)
- California Contractors State License Board, License Check
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