Toilet Repair in the Bay Area — Running, Leaking & Weak Flush
A running toilet wastes water every hour it is ignored, and a leak at the base quietly damages the floor underneath. We repair fill and flush valves, wax rings, loose flanges, supply connections and repeat clogs. Most repairs are done in a single visit, at a price agreed first.
Past repairing? See toilet replacement and new installation.
- Toilets that run constantly or refill on their own
- Water seeping out at the base or around the bolts
- Weak, slow or incomplete flushes
- Toilets that clog again and again
- Fill valve, flush valve and flapper replacement
- Wax ring, flange and closet bolt repairs
- Leaking supply lines, shut-off valves and tank-to-bowl fittings
Signs Your Toilet Needs Repair
Catching these early is almost always cheaper than waiting for the failure.
It runs constantly
A toilet that hisses or refills by itself is losing water from the tank into the bowl, usually past a worn flapper or flush valve seat. It is one of the most common causes of a water bill that has crept up, and it is normally a quick, inexpensive fix.
Water around the base
Damp at the foot of the pan usually means a failed wax ring or a toilet that is not sitting square on the flange. Water is then reaching the subfloor every flush. Left long enough, the floor softens, the flange loses its fixing and the job grows considerably.
The flush is weak or slow
A poor flush is often nothing to do with the valve. Hard water scale blocks the rim holes and siphon jet, so less water reaches the bowl and it flushes lazily. Other causes are a flapper closing early, a low tank level or a partial blockage downstream.
It rocks when you sit on it
Movement means the toilet is not securely fixed, and every rock breaks the wax seal underneath a little further. The cause may be loose closet bolts, a corroded or broken flange, or a floor that has already suffered from a slow leak below.
It clogs repeatedly
A toilet that blocks regularly is usually pointing at something beyond the pan: a partial blockage in the branch, a venting problem, or a main line restriction. Occasionally the trapway itself is scaled or obstructed. Repeat plunging treats the symptom rather than the cause.
Sweating tank or a wet ceiling below
Condensation on the tank is common in humid conditions, but a persistently wet floor or a stain on the ceiling below a first-floor bathroom is not. That usually means a leaking tank-to-bowl connection, supply line, shut-off valve or the seal at the base.
How We Repair a Toilet
Reproduce the fault
We watch the toilet do what it does — a full flush cycle, refill and settle — and check the tank level, the flapper seal and the fill valve shut-off. Seeing the fault happen is faster and more reliable than replacing parts one at a time.
Test rather than assume
A dye test in the tank shows whether water is passing into the bowl unseen. We check the flange and bolts for movement, examine the floor around the base for soft spots, and check the supply line and shut-off valve, which are common leak sources people miss.
Quote before we start
You get the parts and the work explained and priced before anything is taken apart. If the pan is cracked or the internals are obsolete and a replacement makes better sense than a repair, we will tell you that instead of fitting parts that will not last.
Carry out the repair properly
Whether it is a flapper, a fill valve, a complete flush valve, a wax ring or a flange repair, we fit it correctly and reseat the toilet square and level. Where the flange has failed, it is repaired or replaced rather than packed out with extra wax.
Test everything before we leave
We run several flush cycles, check the refill shuts off cleanly, check for movement, and check the base and connections stay dry. If the complaint was repeat clogging, we confirm the branch and the line beyond it are actually clear.
Common Toilet Faults and What They Really Mean
A running toilet is the most common call we get, and the mechanism is simple. Water should sit in the tank until you flush. When the flapper hardens, warps or fails to seat, water trickles into the bowl continuously and the fill valve keeps topping the tank up to compensate. It is a small part, but it runs day and night, and it is worth fixing the day you notice it.
Leaks at the base are more serious than they look. The wax ring seals the toilet to the flange, and once that seal is broken every flush pushes a little water under the pan and onto the subfloor. Because it soaks in rather than pooling, it can go unnoticed for a long time. By the time the floor feels spongy or the ceiling below is marked, the repair involves more than a new wax ring.
Hard water is behind a surprising number of weak flushes here. Mineral scale builds inside the rim channel and the siphon jet, gradually reducing the water reaching the bowl. The toilet has not failed and the valves may be fine — the flow path has simply narrowed. Descaling those passages often restores the flush, and it is worth checking before anyone concludes the toilet needs replacing.
Repeat clogging is usually a message about what is downstream. If one toilet blocks constantly while everything else drains normally, suspect the branch line, a venting issue, or an object lodged in the trapway. If other fixtures gurgle or drain slowly at the same time, the problem is the main line and the toilet is simply the first place it shows up.
What Affects the Price
We quote every job up front, so you approve the price before anything starts. These are the things that move it:
- Which part has failed — a flapper is a very different job to a flange repair
- Whether the toilet has to be lifted to reach the fault
- Condition of the flange and the floor underneath once the pan is off
- Whether the supply line and shut-off valve also need replacing
- Scale build-up in the rim and jet, and whether descaling is needed
- Availability of parts for older, imported or obsolete models
- Whether the real cause turns out to be a blocked branch or main line
Most quotes are free and can be done from photos or video you send us. Some on-site estimates carry a fee based on distance, and we tell you that before we come out.
Toilet Repair — Frequently Asked Questions
Straight answers, without the sales pitch.
Why does my toilet keep running?
Almost always the flapper or the flush valve seat. Rubber hardens and distorts over time, and Bay Area hard water leaves deposits on the seat, so the seal no longer holds. Water trickles into the bowl and the fill valve keeps refilling. Put a little dye in the tank — if colour appears in the bowl without flushing, that is your answer.
There is water around the base. Is that the wax ring?
Usually, but not always. It can also be a leaking supply line, shut-off valve, tank-to-bowl bolts, or simply condensation running down the outside of the tank. We dry it all off and watch where the water actually returns from. A genuine wax ring failure means the toilet comes up and the flange gets checked while it is off.
My flush is weak even though nothing is blocked. Why?
Check the water level in the tank first, then look at the rim holes under the bowl edge and the siphon jet at the bottom. Hard water scale narrows those passages, so less water reaches the bowl and the flush loses its force. Clearing the scale often restores it. A flapper closing too early does the same thing.
Is it worth repairing an old toilet?
Often, yes. Valves, flappers, wax rings and supply connections are all straightforward and the pan itself commonly outlives them. Replacement makes more sense when the pan or tank is cracked, the internals are obsolete and unobtainable, or the toilet has needed repeated attention. We will give you the honest view either way.
One toilet clogs constantly but everything else is fine. What is wrong?
If it is isolated to one toilet, look at the branch line serving it, at venting, or at something lodged in the trapway that catches paper each time. Scale build-up in the trapway can do it too. If other fixtures start gurgling or draining slowly as well, the main line is the more likely culprit.
Can you repair a toilet that rocks?
Yes. Rocking usually means loose or corroded closet bolts, a damaged flange, or an uneven floor. Shimming it is a temporary dodge — every movement works the wax seal loose again. We lift the toilet, inspect the flange and the floor beneath, repair or replace what has failed, and reset it square with a new seal.
Do you charge extra for nights, weekends or holidays?
No. We do not add overtime charges, ever. The rate you are quoted is the same whether we come out on a Tuesday morning or at 2am on a holiday weekend.
Are you licensed and insured?
Yes. Power Plumbing USA holds California contractor license #1082507 and carries full liability insurance. All work is performed to California Plumbing Code, and we pull permits where the job requires them.
Where We Provide This Service
We cover 15 Bay Area cities from our Union City base. See the full service area →