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🛁 Bay Area Plumbing Services

Bathtub Repair
in Bay Area, CA

Is your bathtub faucet dripping all night? Is there water pooling on the floor every time someone takes a bath? A leaking bathtub wastes water, damages your subfloor, and creates the perfect conditions for mold behind the walls. Whether your tub faucet needs a new cartridge or the entire drain assembly has failed, professional bathtub repair gets the problem resolved before the damage spreads.

At United Plumbing and Water Heaters, we repair and replace bathtub faucets, valves, diverters, drain assemblies, overflow pipes, and tub spouts. We serve Dublin, CA, Pleasanton, Livermore, and communities along the I-80 corridor up to Sacramento and Roseville. Our experienced plumber will shut off the water, access the valve behind the wall or through an access panel, diagnose the exact failure point, and complete the repair with manufacturer-spec parts. We also handle bathtub refinishing referrals and full tub replacement when repair is no longer practical.

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★★★★★ 4.9/5 Average | ✓ CSLB Licensed #1116823
Bathtub Repair and Replacement Bay Area

Signs You Need Bathtub Repair

Many homeowners ignore a slow drip from the tub faucet or a sluggish drain, but these problems compound fast. A dripping bathtub faucet can waste over 3,000 gallons per year. A hidden leak behind the wall can rot framing and grow mold for months before you see any visible damage. A licensed plumber can pinpoint the failing component and fix it before a small repair turns into a major renovation. If you notice any of the following signs, contact us.

Dripping Tub Faucet

A bathtub faucet that drips after you turn the handle off has a worn cartridge, damaged seat washer, or corroded valve stem. Bathtub faucet components are larger and more complex than sink faucets, so the repair typically requires removing the handle, escutcheon plate, and cartridge to access the internal parts.

Water Leaking Below the Tub

Stains on the ceiling below a second-floor bathroom or water pooling around the base of a ground-floor tub usually mean a failed drain gasket, cracked overflow pipe, or deteriorated tub shoe fitting. This needs immediate professional attention. Every bath sends more water into the subfloor and wall cavity.

Slow or Clogged Drain

A bathtub that drains slowly has a partial blockage in the P-trap, the drain shoe, or the branch line leading to the main stack. Hair, soap buildup, and mineral deposits are the most common culprits. If plunging and drain cleaner don't fix it, a plumber can snake the line or replace the drain assembly.

Tub Spout Diverter Not Working

When you pull the diverter knob on the tub spout and water still pours from the spout instead of routing to the shower head, the internal gate or diverter valve has failed. This wastes water and reduces shower pressure. The tub spout needs to be replaced.

Cracks or Chips in the Tub Surface

Small chips in a porcelain or fiberglass tub can be filled and sealed by a refinishing specialist. Deep cracks or structural damage to the tub body compromise the watertight integrity of the unit. If water is seeping through the crack with every use, the tub needs to be replaced.

Rust or Discolored Water from Tub Faucet

Rust-colored water coming only from the bathtub faucet points to corroded galvanized supply pipes or a deteriorating valve body behind the wall. This is common in Bay Area homes built before 1980. The corroded section needs to be cut out and replaced with copper or PEX.

How Our Bathtub Repair Service Works

01

Call or Book Online

Contact us by phone or through our online form. We confirm your appointment immediately and give you an arrival window.

02

Technician Arrives Fast

Our licensed plumber arrives on time, shuts off the water, removes the faucet handle and trim, and inspects the valve body, cartridge, supply lines, drain assembly, and overflow connection to find the exact problem.

03

Flat-Rate Quote

We give you a clear, flat-rate price before touching anything. No hidden fees, no surprises. Most bathtub repairs run between $150 and $700 depending on the component and accessibility.

04

Repair & Cleanup

We replace the failed part, reassemble the trim, test water flow through the faucet and drain, verify there are no leaks behind the wall, and leave your bathroom clean. Every job is backed by our warranty on parts and labor.

Why Bay Area Homeowners Choose Us?

Over 7 years and 16,000+ jobs completed across Bay Area & Sacramento.

  • ✓CSLB License #1116823
  • ✓Flat-rate pricing
  • ✓Same-day bathtub repair available
  • ✓Warranty on all parts and labor
  • ✓Available 24/7 with no overtime charges
  • ✓FREE visual plumbing diagnostic
  • ✓We work with all bathtub and valve brands
United Plumbing Team
Bathtub & Fixture Brands We Service
Moen Delta Kohler American Standard Pfister Grohe

Bathtub Repair Service Areas in Bay Area

We provide bathtub repair and replacement across the following cities and surrounding areas:

San Jose
Danville
Alamo
Castro Valley
Pleasant Hill
Concord
Walnut Creek
Pleasanton
Livermore
Dublin
San Ramon
Sacramento
Roseville
Davis
Elk Grove

Frequently Asked Questions

Common questions about bathtub repair and replacement in Bay Area.

How much does bathtub repair cost?
Bathtub plumbing repairs typically cost $150 to $700 depending on the issue. A faucet cartridge replacement runs $100 to $300. A full bathtub faucet replacement costs $250 to $600 including the fixture and labor. Drain repairs average $200 to $700 depending on whether the plumber needs to replace the drain shoe, the P-trap, or a section of the branch line. Contact United Plumbing and Water Heaters for an accurate estimate.
How long does bathtub faucet repair take?
A straightforward cartridge or washer replacement takes about 45 minutes to an hour. If the plumber needs to access the valve behind the wall, remove tile, or replace the entire valve body, the job can take 2 to 4 hours. A full bathtub faucet replacement on exposed plumbing takes about 1 to 2 hours.
Why is my bathtub faucet dripping?
A dripping bathtub faucet is usually caused by a worn cartridge or damaged seat washer inside the valve body. Bathtub valves handle higher water volume than sink faucets, so the internal components wear out faster. In older homes with hard water, mineral deposits can also prevent the cartridge from sealing properly. Replacing the cartridge stops the drip in most cases.
Why is my bathtub leaking from underneath?
A leak underneath the bathtub is most commonly caused by a failed drain gasket where the tub shoe connects to the drain pipe. It can also come from a cracked overflow pipe or a loose slip-joint connection on the P-trap. If you see water stains on the ceiling below or feel soft spots in the floor near the tub, the leak has been active for a while and the subfloor may need inspection along with the plumbing repair.
Can I fix a bathtub faucet myself?
Replacing a tub spout or tightening a loose handle is manageable for most homeowners. Replacing a cartridge or valve behind the wall is more involved. You need to shut off the water, remove the handle, escutcheon plate, and retaining clip, then pull the cartridge with a specialized puller tool. If the valve is behind tile, you risk cracking tiles or causing water damage inside the wall cavity. Please don't forget to shut off the water supply first! As a bathtub supply line delivers high volume and can flood a bathroom in minutes.
Should I repair or replace my bathtub?
If the problem is a leaking faucet, a slow drain, or a small surface chip, repair is the right choice. These fixes cost $100 to $700 and extend the life of your existing tub. If the tub has structural cracks, the enamel is worn through in multiple areas, or you're dealing with water damage to the subfloor and framing behind the tub, replacement is the better long-term investment. A full bathtub replacement including the tub, fixtures, and labor typically starts at $1,500.
How long does a bathtub last?
A cast iron or steel bathtub can last 50 years or more with proper maintenance. Fiberglass and acrylic tubs typically last 10 to 15 years before the surface shows wear. The plumbing components connected to the tub, such as the faucet, valve, and drain assembly, have shorter lifespans. Faucet cartridges typically need replacement every 10 to 15 years. Drain gaskets can fail after 15 to 20 years.
What causes a bathtub drain to clog?
The most common cause is hair combined with soap residue building up in the drain shoe and the P-trap below the tub. Over time this creates a dense plug that restricts water flow. Mineral deposits from hard water make the buildup worse. If the clog is deep in the branch line beyond the P-trap, a plumber's snake or hydro-jetting may be needed to clear it.
Why does my bathtub faucet produce rusty water?
Rusty water from the bathtub faucet only, while other fixtures run clear, indicates corrosion inside the supply pipes leading to that specific valve. This is common in Bay Area homes built before 1980 that still have original galvanized steel pipes. The corroded pipe section needs to be replaced with copper or PEX to permanently fix the problem.
What brands of bathtub fixtures do you repair?
We repair and replace fixtures from all major manufacturers including Moen, Delta, Kohler, American Standard, Pfister, and Grohe. We carry common cartridges and repair parts on our trucks so most bathtub repairs can be completed in a single visit.

Need Bathtub Repair or Replacement in Bay Area?

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