Toilets fail in predictable ways: the tank keeps refilling on its own, water seeps out around the base, the bowl rocks, or the flush just does not clear anymore. None of these fixes itself, and a couple of them can cause real damage to a bathroom floor if they wait. The good news is that most are straightforward repairs, and when a toilet really is done, a new one can be set in a few hours.
Drain Edge Rooter repairs, rebuilds, and replaces toilets in Fontana houses, rentals, and small commercial spaces. We are based at 619 E South St, Rialto, CA 92376, right next to Fontana, and owner Isaiah Infante runs the work under California C-36 plumbing contractor license #1078977.
Water on the floor, or a toilet that will not stop running? Call (909) 927-3194. If water is spreading, turn the oval valve behind the toilet clockwise to shut it off first, then call.
Fix It or Replace It?
Almost every working part of a toilet can be replaced: fill valve, flapper, flush valve, handle, tank-to-bowl gasket, supply line, wax ring, and bolts. A repair is usually the right call. Replacement is worth it when the bowl or tank is cracked, the toilet is an old high-volume model, parts are discontinued, or it clogs again and again because of a poor bowl design. We tell you which situation you are in and leave the decision to you.
Toilet Repairs We Handle in Fontana
Constant running or phantom refills
A toilet that refills every so often with nobody using it is leaking water from the tank into the bowl, usually past a worn flapper or flush valve seal. One that hisses nonstop usually has a fill valve that no longer shuts off. A few drops of food coloring in the tank will show a flapper leak within about 15 minutes if color appears in the bowl. We replace the worn parts, clean the valve seat, and set the water level correctly.
Water around the base
The most common cause is a failed wax ring or a broken closet flange. We also rule out a sweating tank, a dripping supply line, or a cracked tank before pulling the toilet. A base leak should not be ignored. It soaks the subfloor, can damage the ceiling below in a two-story home, and can let sewer gas into the room.
A wobbly toilet
If the toilet moves when you sit on it, the wax seal is being broken a little more every day. Causes include loose or corroded bolts, an uneven floor, or a flange that is cracked or sitting below the finished floor height after new tile or vinyl. We repair or replace the flange, use a new seal, and shim the toilet solid.
Weak flushes
Scale in the rim holes and siphon jet, a tank set too low, a worn flush valve, or a partial blockage in the trap can all weaken a flush. In older bowls in hard-water areas, mineral buildup in the rim holes is common and can be cleaned out.
Recurring clogs
If one toilet keeps clogging, the trap, the toilet design, or the branch line it drains into may be the problem. If several drains are slow or gurgle, the main line is the likely cause. See drain cleaning in Fontana or, if sewage is coming up, sewer backup in Fontana.
Leaky shutoff valves and supply lines
The small shutoff valve behind the toilet often seizes or drips after decades of hard water. Old braided or plastic supply lines can also crack. We replace both as part of most repairs so a failed part does not flood the bathroom later.
Fontana Water and What It Does to Toilet Parts
Most homes in the city get water from Fontana Water Company. Its 2025 Consumer Confidence Report lists average hardness of 151 mg/L for groundwater and 134 mg/L for treated surface water, roughly 8 to 9 grains per gallon. Parts of the west side are served by Cucamonga Valley Water District, which reported an average of 125.5 mg/L in 2025, and a few areas by West Valley Water District. All of that counts as hard water.
For toilets, hard water means mineral buildup on fill valves and flapper seats, crusty rim jets, and shutoff valves that stick. Rubber flappers and seals stop sealing sooner when scale forms under them. If you are replacing parts every year or two, a quality fill valve and a flapper rated for treated water can help, and a whole-house softener reduces the problem across every fixture.
What Fontana’s Housing Mix Means for Toilet Work
Older homes in central and south Fontana
Homes built in the post-war decades around downtown, along Sierra Avenue, and south of the 10 often have original or decades-old toilets, metal closet flanges that have corroded, and shutoff valves that have not been turned in years. Some have non-standard rough-in distances. Replacing a toilet in these homes often means repairing the flange too, and we check before quoting.
Southridge Village and 1980s–1990s tracts
These homes usually have two or three bathrooms, and the original toilets often wear out around the same time. Fill valves, flappers, and wax rings are the usual repairs, and many owners decide to upgrade all the toilets at once to newer high-efficiency models.
Newer north Fontana homes
In newer construction near the 210, Sierra Lakes, and Hunter’s Ridge, the toilets are already low-flow models. Our calls there are mostly running toilets, clogs, and the occasional base leak after a remodel raised the floor height.
New Toilet Installation
A proper install covers more than setting the bowl:
- Removing and hauling away the old toilet
- Checking the closet flange and repairing or replacing it if it is cracked, loose, or too low
- A new wax ring or wax-free seal, new bolts, and a new supply line
- Replacing the shutoff valve if it is old or stuck
- Leveling and securing the toilet so it does not move
- Testing several flushes and checking for leaks before we leave
Picking a toilet
We help you compare bowl shape (round or elongated), height (standard or comfort height), one-piece versus two-piece, and flush performance. The most important measurement is the rough-in, the distance from the wall to the center of the drain. Most homes use 12 inches, but older homes may have 10 or 14, which limits your options. We measure before you buy.
Water use
California requires new toilets to use no more than 1.28 gallons per flush. Older toilets can use 3.5 gallons or more. Replacing an old high-volume toilet can make a noticeable difference in water use, which matters with tiered water rates.
Permits
A straight toilet repair or a like-for-like replacement in the same spot usually does not require a permit in Fontana. Moving a toilet, adding a new bathroom, or changing drain lines does, and that goes through the City of Fontana Building and Safety Division. We tell you if your project needs one and handle it when it does.
Keeping Toilets and Drains Clear
Only toilet paper and waste should go down a toilet. Wipes labeled “flushable,” paper towels, cotton swabs, and hygiene products do not break down and cause a large share of the clogs we clear, both in the toilet trap and further down in the main line. In homes with mature trees, roots in the sewer line can make those clogs worse. If the same toilet clogs often even with careful use, a camera inspection in Fontana shows what is going on in the line.
Pricing
Repairs are priced by the part and the work involved. Installations depend on the toilet you choose, whether the flange or shutoff valve needs replacing, and any floor repairs. You get the price before we start, and we will not push a new toilet when a repair will do.
How the Visit Goes
- Call: describe what the toilet is doing and whether there is water on the floor.
- Arrival: we drive over from our Rialto shop with a realistic window.
- Diagnosis: we find the actual cause, not just the symptom.
- Options: repair or replace, with a price for each.
- Work: done cleanly, with floors protected and old parts removed.
- Test: multiple flushes and a leak check before we leave.
Fontana Neighborhoods We Serve
- Downtown and the Sierra Avenue corridor: older homes with original toilets, worn flanges, and stuck shutoffs
- South Fontana below the 10: mid-century homes and rentals where repairs keep tenants’ bathrooms working
- Southridge Village: multi-bath family homes where several toilets need attention at once
- North Fontana, Sierra Lakes, and Hunter’s Ridge: newer homes with running toilets, clogs, and remodel-related leaks
We also work in Rialto, Colton, San Bernardino, and Rancho Cucamonga. The Fontana service area page lists our other services in the city.
Why Call Drain Edge Rooter
- Close by: our shop on East South Street in Rialto is a short drive from Fontana.
- Licensed: California C-36 #1078977.
- Honest recommendations: a repair when it makes sense, a new toilet when it does not.
- Reviews you can check: read our Google reviews from Inland Empire customers before you call.
Toilet Repair FAQ for Fontana
Why does my toilet keep running?
Usually a worn flapper or a fill valve that does not shut off. Hard water in Fontana builds scale on these parts and shortens their life.
Is water at the base of the toilet urgent?
Yes. It usually means a failed wax ring or flange, and it can damage the subfloor. Shut off the water to the toilet and call.
Can you replace just the wax ring?
Yes. We pull the toilet, check the flange, set a new seal, and reset the toilet securely.
How long does a new toilet install take?
Usually a few hours, longer if the flange or floor needs repair.
Can I buy my own toilet?
Yes. Send us the model first, and we will check that it fits your rough-in.
Why does one toilet clog all the time?
It can be the toilet design, a blockage in the trap, or a problem in the drain line. If other drains are slow too, the main line is the likely cause.
Do I need a permit to replace a toilet?
Usually not for a like-for-like replacement. Moving a toilet or adding a bathroom does need one, and we take care of it.
What if sewage is coming up into the tub?
That points to a main line blockage. Stop using water and see our emergency plumber page for Fontana.
Book Toilet Repair or Installation in Fontana
Whether it is a running toilet in a Southridge hallway bath, a rocking toilet in an older house near Sierra Avenue, or a set of new high-efficiency toilets for a north Fontana home, Drain Edge Rooter will fix the real problem and leave the bathroom clean.
Call (909) 927-3194
Drain Edge Rooter · 619 E South St, Rialto, CA 92376 · (909) 927-3194 · CA C-36 #1078977 · drainedgerooter.com
Related: Drain Cleaning in Fontana · Sewer Backup in Fontana · Fontana
Toilet repair and installation in Fontana: local notes
We work across Fontana, including downtown along Sierra Avenue, North Fontana, Southridge Village, Sierra Lakes and Hunter’s Ridge. The area has homes going back to the 1940s, when the Kaiser Steel mill drew workers to the area, plus large tracts built since the 1980s.
Hard water in Fontana wears out flappers and fill valves quickly. A toilet that clogs over and over can also point to a problem further down the line.
Whether you are near Foothill Boulevard (old Route 66), Fontana Park and the former Kaiser Steel land on the south side or anywhere else in Fontana, we are open 24/7, so call anytime at (909) 927-3194.