Back to Home
🚽 Bay Area Plumbing Services

Toilet Replacement
& Repair
in Bay Area, CA

Is your toilet running nonstop, rocking on the floor, or leaking at the base? Every day you wait, that's wasted water on your utility bill and potential damage to your subfloor. Whether you need a simple flapper fix or a full toilet replacement, professional service ensures the wax ring seats correctly, the flange is solid, and the new unit doesn't leak.

At United Plumbing and Water Heaters, we repair and replace all types of toilets, from standard two-piece models to one-piece comfort-height units and WaterSense-certified high-efficiency toilets. 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, remove the old toilet, inspect the closet flange and subfloor condition, and install your new toilet correctly. We use a fresh wax ring and new stainless steel supply line on every installation.

Get a Free Estimate 📞 +1 (925) 396-9254
★★★★★ 4.9/5 Average | ✓ CSLB Licensed #1116823
Toilet Replacement and Repair Bay Area

Signs You Need Toilet Repair or Replacement

Many homeowners put off a toilet problem because it still flushes. But a running toilet can waste over 200 gallons of water per day, and a bad wax seal can silently rot your subfloor for months before you see the damage. A licensed plumber can tell you whether a $20 part will fix the issue or whether the toilet needs full replacement. If you notice any of the following signs, contact us.

Toilet Runs Constantly

A toilet that won't stop running has a faulty flapper, fill valve, or overflow tube. The flapper is a rubber seal at the bottom of the tank. When it warps or deteriorates, water leaks continuously from the tank into the bowl. This is one of the biggest hidden water wasters in any home.

Leaking at the Base

Water pooling around the base of the toilet means the wax ring has failed. The wax ring creates the watertight seal between the toilet and the closet flange. Once it fails, sewage water seeps out with every flush. This needs immediate attention to prevent subfloor rot and mold.

Toilet Rocks or Wobbles

A toilet that moves when you sit on it has loose closet bolts or a broken flange. If the flange is cracked, the bolts have nothing to grip and no amount of tightening will fix the wobble. A rocking toilet will eventually break the wax seal and start leaking.

Cracks in the Porcelain

A hairline crack in the tank or bowl may not leak today, but porcelain cracks grow over time. A cracked tank can fail suddenly and dump several gallons of water onto your bathroom floor in seconds. If you spot a crack, the toilet should be replaced before it fails completely.

Frequent Clogs

Older toilets with smaller trapways and weaker flush mechanisms clog more often. If you're plunging the same toilet every week, the internal passage is likely too narrow or partially calcified. A modern toilet with a larger trapway and stronger flush will solve the problem permanently.

Toilet Over 15-20 Years Old

Toilets manufactured before 2006 use 3.5 to 5 gallons per flush. Current WaterSense-certified models use 1.28 gallons or less. Replacing an old toilet can save a family of four over 13,000 gallons of water per year and noticeably lower your utility bill.

How Our Toilet Replacement 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, drains the old toilet, and inspects the closet flange, the shut-off valve, the supply line, and the subfloor condition before starting any work.

03

Flat-Rate Quote

We give you a clear, flat-rate price before touching anything. No hidden fees, no surprises. Toilet replacement typically starts at $400 for a standard two-piece toilet and can exceed $1,000 for a wall-mounted model. Toilet flange replacement usually costs between $800 and $1,200.

04

Replacement & Cleanup

We remove the old toilet, set the new wax ring, install and level the new unit, connect the supply line, test multiple flushes for leaks, and haul away the old toilet. 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 toilet replacement available
  • ✓Warranty on all parts and labor
  • ✓Available 24/7 with no overtime charges
  • ✓FREE visual plumbing diagnostic
  • ✓We install your toilet or the one you purchased
United Plumbing Team
Toilet Brands We Install & Replace
Toto Kohler American Standard Delta Gerber Mansfield

Toilet Replacement Service Areas in Bay Area

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

San Jose
Fremont
Concord
Walnut Creek
Richmond
Pleasanton
Livermore
Dublin
San Ramon
Vallejo
Napa
Fairfield
Vacaville
Sacramento
Roseville
Davis
Elk Grove

Frequently Asked Questions

Common questions about toilet replacement and repair in Bay Area.

How much does it cost to replace a toilet?
Toilet replacement typically starts at $400 for a standard two-piece toilet and can exceed $1,000 for a wall-mounted model. Toilet flange replacement usually costs between $800 and $1,200. Contact United Plumbing and Water Heaters for an accurate estimate.
How long does toilet replacement take?
A straightforward toilet swap takes 1 to 2 hours. This includes shutting off the water, removing the old unit, inspecting the flange, installing the new toilet, and testing for leaks. If the flange is cracked, the subfloor is damaged, or the shut-off valve needs replacement, the job can take up to 3 hours. We complete most toilet replacements same-day.
Should I repair or replace my toilet?
If the issue is a running flapper, a faulty fill valve, or a loose handle, repair makes sense. These parts cost $10 to $30 and take under an hour to replace. If the porcelain is cracked, the toilet rocks on a broken flange, or the unit is over 15 years old and uses 3.5+ gallons per flush, replacement is the better investment. You'll save money on water bills and avoid repeated service calls.
Can I replace a toilet myself?
Yes, a like-for-like toilet swap is a manageable DIY project if you have basic tools and some plumbing experience. The risk is in what you find underneath. A wax ring seated even slightly off-center will leak into the subfloor invisibly for months. An overtightened closet bolt can crack the porcelain base. And a damaged flange that doesn't get replaced will cause the toilet to rock and eventually break the seal. Please don't forget to shut off the water supply valve first! As you will have a flooded bathroom very quickly.
What is a toilet flange and why does it matter?
The toilet flange is a ring that sits on top of the drainpipe in the floor and secures the toilet to the ground. The closet bolts pass through it and hold the toilet in place. The wax ring sits between the flange and the toilet base to create a watertight seal. If the flange is cracked or corroded, the toilet will wobble, the wax ring will fail, and sewage water will leak onto your floor. Flange repair typically adds $100 to $300 to a replacement job.
What is a rough-in and what size do I need?
The rough-in is the distance from the wall behind the toilet to the center of the drainpipe in the floor. Most homes have a standard 12-inch rough-in. Older Bay Area homes sometimes have 10-inch or 14-inch rough-ins. You need to measure this before buying a new toilet. If you get the wrong size, the toilet either won't fit or will sit too far from the wall. Our plumber measures the rough-in during the diagnostic visit so you get the right model.
Why does my toilet keep running?
A constantly running toilet is almost always caused by a worn flapper that no longer seals the flush valve opening at the bottom of the tank. Water leaks from the tank into the bowl, the fill valve detects the drop in water level, and it keeps refilling. Replacing the flapper costs under $10 for the part. If the flapper is fine, the fill valve itself may be stuck open or the overflow tube may be set too low.
How long does a toilet last?
The porcelain body of a toilet can last 25 to 50 years. The internal components wear out much sooner. Flappers typically need replacement every 4 to 5 years. Fill valves last about 5 to 7 years. Wax rings last 15 to 20 years if the toilet doesn't move or rock. If the porcelain itself is cracked or the toilet predates modern water efficiency standards, full replacement is the right move.
What is a WaterSense toilet and is it worth it?
WaterSense is an EPA certification for toilets that use 1.28 gallons per flush or less, compared to the federal maximum of 1.6 gallons. A family of four replacing an old 3.5-gallon toilet with a WaterSense model saves roughly 13,000 gallons per year. Some Bay Area water utilities offer rebates for installing WaterSense-certified toilets, which can offset part of the replacement cost.
What brands of toilets do you install?
We install all major brands including Toto, Kohler, American Standard, Delta, Gerber, and Mansfield. We can install a toilet you've already purchased or help you pick the right model based on your bathroom layout, rough-in measurement, and water efficiency preferences.

Need Toilet Replacement or Repair in Bay Area?

Get Free Estimate 📞 +1 (925) 396-9254
Scroll to Top