Bathtub Drain Stopper and Drain Assembly Replacement Cost in California
A bathtub that will not hold water — or worse, will not drain because the stopper is stuck closed — is one of those small failures that turns out to have half a dozen possible culprits, from a $15 rubber-tipped stopper to a corroded linkage inside the overflow tube. The good news: most stopper problems are cheap. The useful skill is telling the cheap ones from the ones that mean the tub's whole waste-and-overflow assembly is at end of life.
Know your stopper — it decides the fix
- Lift-and-turn / push-pull / toe-touch: the stopper threads onto a post in the drain crossbar. These unscrew by hand or with light pliers and cost $10–$40 to replace. Most "won't hold water" complaints are a worn seal on one of these.
- Pop-up with trip lever: the visible stopper is connected to a linkage running up through the overflow tube to the lever on the tub wall. When it stops sealing or sticks half-open, the linkage needs adjusting or replacing — parts $20–$60.
- Trip-lever with internal plunger: nothing visible in the drain; a brass weight inside the overflow tube seals the line. These clog with hair and corrode with age, and are the most common type to seize entirely.
Typical costs in California
- DIY stopper swap: $10–$60 in parts, no tools beyond pliers and a screwdriver for most types.
- Plumber service call to repair/replace a stopper or linkage: typically $150–$350 — mostly the trip charge, since the work itself is under an hour.
- Full waste-and-overflow assembly replacement: typically $300–$700 when accessible from below or through an access panel; more if the tub surround or ceiling below must be opened. This is the fix when the drain shoe, overflow gasket, or tub drain fitting itself is corroded or leaking.
If water shows up on the ceiling under the bathroom whenever someone bathes, suspect the overflow gasket or drain shoe rather than the stopper — our guide to water leaking through the ceiling below a bathroom walks through that diagnosis.
Stuck stopper vs clogged drain
A tub that drains slowly with the stopper fully open usually has a hair clog just below the crossbar or in the trap — a different problem with different fixes, covered in our clogged bathtub guide. A quick test: if pulling the stopper out entirely (or removing the trip-lever plate and lifting the plunger) restores fast drainage, the stopper mechanism was the obstruction. If drainage stays slow with everything removed, it is a clog, and snaking through the overflow opening is the usual route.
The safety angle nobody mentions
A tub that drains badly or holds standing water is not just an annoyance. An analysis by the CDC published in Morbidity and Mortality Weekly Report in 2011 ("Nonfatal Bathroom Injuries Among Persons Aged ≥15 Years — United States, 2008") estimated roughly 234,000 emergency-department-treated bathroom injuries per year among adults in the US, with the largest share occurring in or around the tub and shower, and injury rates rising steeply with age (study on Google Scholar). Standing water from a half-closed stopper makes the tub floor exactly the slick surface that study warns about — a real reason not to live with a "mostly working" drain in a household with older adults. For accessibility-driven upgrades, see our guides to tub-to-shower conversions and walk-in tubs.
When to call a plumber
Call when the trip-lever plunger is seized (forcing it snaps the linkage), when the drain shoe or overflow is leaking, or when the visible parts are so corroded that a simple swap risks cracking the tub fitting. Homeowners in Daly City, Apple Valley and Santa Cruz use Plumber Comparator to find licensed local plumbers for small bathroom repairs like this. Request a free quote and mention the stopper type — a photo of the drain and the overflow plate is usually enough for an accurate price.
Need a plumber you can trust?
Tell us about the job — a licensed California plumber gets back to you with a real quote.
Get free quotes