What Is Actually Failing Inside the Wall
Your tub faucet is a valve in the wall. Behind the handle sits the part that does the work: a cartridge on most newer homes, or a stem with a rubber washer and brass seat on older two-handle sets. That valve body sits behind a trim kit on the front. When the working part wears, water slips past it and you see a drip at the spout or the shower head.
The rubber and plastic pieces fail first. O-rings flatten, washers harden, and the seat, which is the small brass ring the washer presses against, picks up pits and scale. A drip is the early warning. A handle that has gone stiff or spins freely tells you the stem or the handle screw is the problem instead.
Two handles versus one
Two-handle faucets use compression stems, one for hot and one for cold. The drip usually follows whichever side feels softer when you close it. Single-handle faucets use one cartridge that blends both, so a drip can come from either supply and you replace the whole cartridge.
Why the spout and the shower head both matter
The diverter is the little pull-up knob or lever that sends water to the shower head. If water keeps dribbling from the shower head while the tub fills, the diverter gate is not sealing. If water pours from the tub spout while the shower runs, the same part is the likely culprit.
Symptoms and What They Usually Mean
Match what you see to the likely part before you shut anything off. It saves a trip to the hardware store.
Steady drip from the spout
A worn washer or seat on a two-handle set, or a tired cartridge on a single handle. Hot-side drips often show up first because heat ages rubber faster.
Water stays warm when set to cold
A cartridge that no longer blocks the hot port, or a failed check stop. Cold-only supply will not produce this symptom on its own.
Handle is stiff or gritty
Mineral scale on the stem or cartridge. Hard water leaves a white crust that grips the moving parts.
Shower head trickles after the tub fills
The diverter is not seating. On many tubs it is a spout-mounted pull-up that unscrews for cleaning.
Wet spot on the wall behind the tub
A leaking valve body or a failed joint inside the wall. Stop using the tub and call, because this is not a trim-kit repair.
What Crowley Water Does to Tub Valves
The City of Crowley 2025 Water Quality Report lists total hardness of 108 to 150 mg/L as calcium carbonate, which the report states as 6 to 9 grains per gallon. The pH ran 7.8 to 8.5. In plain terms, the water is moderately hard and slightly alkaline.
For a tub valve, that means scale builds on cartridges and stems over the years, and a stiff handle is a normal sign of it. If you pull a cartridge and it is crusted white, soaking it in vinegar for a few hours often frees it, but a worn O-ring still needs replacing. A water softener slows the buildup, and our water softener and filtration page explains the options.
Source: City of Crowley 2025 Water Quality Report
Safe Steps Before You Open the Handle
These steps need only basic tools. Work slowly and keep the parts in order as they come off.
Shut off the water.
Look for a shutoff behind an access panel on the other side of the tub wall, or use the main shutoff valve at the house. Open the tub faucet to drain the line and confirm the flow has stopped.
Plug the drain and protect the tub.
Put a rag in the drain so a dropped screw does not disappear. Lay a towel over the tub floor to protect the finish from dropped tools.
Remove the handle and trim.
Pry off the small cap, remove the handle screw, then pull the handle and escutcheon plate. Take a photo of the stack order so reassembly is easy.
Pull the stem or cartridge.
Use a deep socket on a compression stem, or a cartridge puller or pliers on a single handle. Note which way the cartridge faces, since many have a hot-side marking.
Match the part exactly.
Take the old cartridge or washer to the supply store. Valve brands differ, and a part that is close but not exact will leak the day you install it.
Tub Faucet Types and Their Repair Parts
Knowing your valve type tells you what to buy and how hard the job is.
| Valve type | Typical wear part | Difficulty |
|---|---|---|
| Two-handle compression | Rubber washer and brass seat | Easy to moderate. |
| Single-handle cartridge | Plastic or brass cartridge and O-rings | Moderate. |
| Pressure-balance valve | Balance spool and seals | Moderate to hard. |
| Thermostatic valve | Thermostatic cartridge | Hard, often a plumber. |
| Diverter spout | Gate and O-ring | Easy. |
Most universal parts are sold locally, but valve bodies in the wall differ by maker, so match the part to the brand stamped on the trim.
What You Can Do Yourself and When to Stop
Cartridge swaps are within reach for a patient homeowner. A few situations are not.
Reasonable DIY
- Replace a washer, seat or O-ring on a compression stem.
- Swap a single-handle cartridge with the correct part.
- Clean scale from the aerator, cartridge and diverter.
- Tighten a loose handle or spout set screw.
Call a plumber
- Water seeping into the wall or ceiling below.
- A stem that will not budge or a rounded valve body.
- No shutoff behind the tub and the main will not close.
- A valve body that needs soldering or a new access panel.
What a Plumber Does Differently
A licensed plumber starts by shutting off and testing, not guessing. We check whether the problem is at the handle, the spout or the valve body, and we confirm the shutoffs actually hold before cutting anything. If the valve body is damaged, we open the wall from the back or through a small access panel, which is cleaner than breaking tile.
Replacement parts are matched to the valve, not forced. We also look at supply pressure and the condition of the tub drain while the wall is open, since a worn faucet and a slow drain often show up together. That is why a visit can be a faucet repair and a short leak check in one trip.
What Affects the Cost of Tub Faucet Repair
We give you a clear price before work starts. These are the factors that move it up or down.
Homeowners policies usually cover sudden and accidental water damage and usually not a slow drip or wear over time. Ask your carrier before you assume a claim applies.
Where This Fits in Your Neighborhood
If you live near Burleson, our Burleson team covers the same 76028 area and handles the same tub work. Homes in Everman and Forest Hill draw on different water systems, so ask the city for its annual water quality report before assuming your scale matches Crowley's. Our Everman page and Forest Hill page cover those towns.
Bathtub Faucet Questions
A worn washer, seat or cartridge lets water slip past. Hard water scale makes it worse because it roughens the sealing surface.
Only if there is a fixture shutoff behind an access panel. Without one, the main must be closed, since you cannot safely pull a cartridge under pressure.
Take the old one to the store and match the length, splines and stamped brand. Photograph the trim before you take it apart.
Usually it is the diverter or the cartridge. If the shower head drips only after the tub fills, the diverter gate is the likely culprit.
Yes. The 2025 City of Crowley report states hardness of 6 to 9 grains per gallon, so scale gradually stiffens handles and cartridges.
A slow drip can wait for a scheduled visit. Water in the wall, a ceiling stain below, or a valve that will not shut off needs a call right away.