Toilet overflow emergency: stop the water first
Reach the shutoff
The oval valve on the wall or floor behind the toilet. Turn it clockwise.
Lift the float
If the shutoff is stuck, take the tank lid off and lift the float arm or rod to stop the fill.
Do not flush again
A second flush adds water to a bowl that is already full.
Call us
If every toilet and tub is backing up, the main line may be blocked. See sewer line cleaning.
What your toilet is telling you
| Symptom | Likely cause | Typical fix |
|---|---|---|
| Bowl fills and will not flush | Clog in the trap or branch | Auger, or pull the toilet if needed |
| Tank keeps running | Worn flapper or fill valve | Replace the parts |
| Water at the base | Failed wax ring or loose bolts | Reset with a new seal |
| Rocking toilet | Loose flange or bolts | Secure the flange, replace the seal |
| Crack in the bowl or tank | Impact or age | Replace the toilet |
| Weak flush | Clogged rim jets or low water | Clean jets, adjust the fill |
If other fixtures gurgle when you flush, the toilet is not the problem. Drain cleaning explains how we trace a shared blockage.
Toilet overflowing?
Shut the valve and call. We will help you contain it while we head your way.
When to replace instead of repair
Repair is usually enough when
- The tank or bowl is not cracked
- Only the flapper, fill valve or seal failed
- The toilet is relatively young
- The flush works when the part is fixed
Replace when
- The bowl or tank is cracked
- The toilet clogs often
- Parts are no longer available
- You want a more efficient fixture
Modern toilets use less water per flush than older ones. California requires new toilets sold in the state to meet water efficiency standards, and a replacement may lower your water use compared with a toilet from the 1950s or 1960s.
Installation done on a sound flange
- We check the flange for cracks, rust or a poor fit, because a damaged flange makes any toilet rock and leak.
- We set a new wax or wax-free seal and tighten the bolts evenly.
- We replace the supply line and shutoff valve if they are corroded.
- We test flush and check for leaks before we leave.
- We haul away the old fixture.
What affects toilet repair and install cost
We give a clear price before work starts. Factors:
Insurance seldom covers worn toilets, but may cover damage from a sudden overflow. Keep photos.
Want your real number? Describe the job on the call and we quote it before work starts.
Service area
We repair and install toilets in 94523 and nearby 94521 and 94518 in Concord. The Concord page has more.
Toilet installation follows the California Plumbing Code, which is based on the Uniform Plumbing Code (UPC), including water efficiency standards for new toilets sold in California and rules for flange and clearance dimensions.
Common questions
Yes. The line is open 24/7. Shut the valve behind the toilet and call, and we will book the earliest visit.
Usually a worn flapper or a fill valve that does not shut off. Both are inexpensive parts.
The wax ring may have failed, or the bolts may be loose. We reset it with a new seal.
Usually yes, with an auger. If an object is stuck, we may need to remove the toilet.
Often one to two hours when the flange and floor are sound.
If only one toilet is affected, it is local. If tubs and other toilets gurgle, the line is blocked.
Still have a question about your situation? Call (855) 575-2890 any hour and describe what you are seeing.