Plumbing discussions and local services.
Discussion options
How should I compare quotes for a shower valve repair versus replacement?
I’m trying to get a fair scope for repairing a leaking single-handle shower valve, rather than assuming the most expensive option is necessary.
The valve is roughly 15 years old. Water is dripping from the showerhead when the handle is off, but there’s no visible leak around the handle or from the wall. That sounds like it could be a worn cartridge, although I don’t know the valve brand or whether replacement cartridges are still available. The existing trim is also dated, so I’m unsure whether new trim would fit the current valve body.
The valve is in a tiled shower, and there’s no obvious access panel from the bathroom. An adjoining room is on the other side of the wall, but I haven’t opened it up to see whether the valve can be reached there.
For anyone who has compared these jobs, should a quote separately identify:
- Cartridge diagnosis and replacement, including the cartridge and any retaining hardware
- Testing the valve body before deciding a full replacement is needed
- Removing the existing trim and handling seized or damaged parts
- Opening and restoring the wall if the valve body has to be replaced
- Access from the adjoining room versus cutting the shower tile
- New trim compatibility, shutoff work, soldering or press connections, and leak testing
- Tile, drywall, paint, or other finish repairs after the plumbing work
Would you expect a plumber to confirm the valve brand and cartridge availability before quoting a full valve replacement? Also, if the leak is only from the showerhead with the handle off, what findings would justify replacing the valve body instead of trying the cartridge first?
Join the conversation
Share your experience or ask a follow-up question.
6 replies
Since the valve is about 15 years old and the brand is unknown, have each bidder state whether the price includes identifying the valve and sourcing a compatible cartridge before any wall is opened. A cartridge-only quote isn’t very useful if the part is obsolete or requires a special retaining clip.
I’d want the quote to distinguish:
- Diagnosis and model/part identification
- Cartridge and retaining hardware, if available
- Labor to remove seized trim or damaged fasteners
- A separate allowance for valve-body replacement and access
- Wall or tile restoration, listed separately from plumbing labor
That makes the repair-versus-replacement decision clearer. Also ask whether they’ll test the valve body and pressure-test the work before closing an adjoining-room opening or repairing tile. New trim may be cosmetic only unless it’s confirmed compatible with the existing valve body.
The quote should also spell out what happens if the old cartridge is seized and removal damages the valve body. That risk is separate from ordinary cartridge labor, especially on a 15-year-old unknown valve.
I’d want one of these written clearly:
- The plumber stops and gets approval before proceeding with valve-body replacement.
- A preapproved replacement allowance applies, with access and wall restoration priced separately.
- The contractor accepts responsibility for damage caused by the removal method.
Otherwise, “cartridge replacement” can turn into an unexpected full replacement after the wall is opened. I’d also have them state whether the diagnostic charge is still due if the cartridge can’t be removed safely.
I’d be cautious about asking the contractor to accept responsibility for damage simply because a 15-year-old cartridge won’t come out. Even careful removal can expose a valve body that’s corroded or too fragile to reuse; that isn’t necessarily damage caused by the plumber.
A more useful comparison is to ask what removal method they plan to use, when they’d stop rather than risk the body, and what the next step would cost if the cartridge can’t be removed safely. Have that approval point and any replacement allowance written into the quote.
Would you also ask the plumber to confirm the showerhead stops dripping after the repair? If it still drips, the valve may not be shutting off fully, so that result matters more than simply fitting a new cartridge.
A brief drip just after shutoff can be residual water draining from the shower arm or head, not water continuing through the valve. Confirming whether the dripping stops after the repair is useful, but distinguish a short residual drip from ongoing dripping before treating it as evidence the valve isn’t shutting off.
A drip from the showerhead alone doesn’t establish that the valve body needs replacing. The stronger reasons would be a visible crack or severe corrosion, damage to the cartridge bore or sealing surfaces, or no compatible service parts. I’d ask what specific finding supports replacing the body rather than trying a cartridge first, and have any move to full replacement approved before the scope expands.
Find a local plumber.
Loading local plumbers…