Will You Still Have Water During Sewer Line Repair?
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Verify before you rely on this guide. This is general educational information, current as of October 11, 2026. Codes, permit rules, fees, prices, product warranties and industry practices change, and every property is different. You must confirm up-to-date information with the City of Pasadena or your local building authority, a licensed plumbing or sewer contractor, and the sources listed in this guide before making any decision.
Your clean-water supply may stay on during sewer line repair, but you may not be able to use the fixtures that drain into the affected sewer. Those are two different questions. Water comes into your home through the supply piping; wastewater leaves through drains and the sewer connection.
When the sewer is opened, lined, or temporarily disconnected, using a toilet or running a washing machine can send wastewater into the work area or back toward your home. Your contractor should give you a specific “no wastewater discharge” schedule before the work starts.
Will the water company turn off the water?
Not necessarily. Most sewer repairs focus on wastewater piping rather than the potable-water service. A shutdown of drinking-water supply is a separate operation and should not be assumed just because someone is repairing the sewer.
However, access excavation near other utilities or project-specific work may call for a separate water-service interruption. Ask explicitly whether the water supply will be shut off, who controls the shutoff, and when it will return.
Even with the taps running, you might be told not to drain water into the line.
Which fixtures might be off limits?
If the affected line receives wastewater from the whole house, restrictions can apply to toilets, showers, sinks, dishwashers, and laundry. A few examples make the difference clear:
| Situation | Can you use it? |
|---|---|
| Filling a glass from a running faucet | The water supply may work, but ask where the water will be discharged. |
| Flushing a toilet into a disconnected sewer | No, unless the crew specifically says that fixture has an alternate safe route. |
| Running a washing machine during liner curing | Usually avoid it when the washer drains into the affected line. |
| Using an unaffected drain branch | Only after the contractor confirms it is independent of the work area. |
| Using fixtures during a contractor-managed bypass | Follow the crew's specific limits; a bypass does not automatically allow unrestricted use. |
A sink is not “available” for ordinary use merely because clean water comes out. The drain must also have a safe place for the wastewater to go.
How do different repair methods affect the schedule?
Open excavation or a spot replacement: Crews may need the line inactive while damaged pipe is removed and new connections are made. The exact interruption depends on how much of the system is opened.
Cured-in-place pipe lining: Some installation specifications require the affected lateral to be kept free of wastewater during preparation, liner installation, and curing. The required cure time depends on the product and process; there is no reliable universal household shutdown duration.
Pipe bursting: Replacement and tie-ins may require temporary sewer isolation. Access pits, reconnections, and testing can affect when drainage can safely resume.
Find more about the sequence in how long sewer line repair can take and how sewer pipe lining works.
What should you ask your contractor before the crew arrives?
Ask for a written answer to four practical questions: Which fixtures are affected? When does the restriction begin and end? Is any temporary bypass available? Who gives the final all-clear?
If your household has infants, mobility limitations, medical needs, or people working from home, tell the contractor beforehand. They may be able to help you plan work windows, but do not assume that a bypass or temporary toilet service is included unless the contract says so.
The crew should also explain what to do if you accidentally run water during the restricted period.
How should you prepare the household?
Do laundry, bathing, and dishwashing before the restricted work window when practical. Make a bathroom plan, especially if every toilet drains to the repaired line. Tell other occupants, guests, caregivers, and cleaners that wastewater discharge may be restricted.
Keep children and pets away from open access pits and sewage-contaminated areas. If you already have an active backup, reduce use of the affected fixtures and request immediate professional guidance rather than testing the drains repeatedly.
You usually do not need to stockpile drinking water unless the contractor identifies a separate water-supply interruption. Filling containers is reasonable if one has actually been scheduled.
When can you use everything normally again?
Wait for the repair crew's explicit confirmation, not just the moment equipment leaves the yard. Depending on the method, the crew may need to complete curing, reconnections, inspection, or specified tests before allowing normal discharge.
Ask for any post-repair restrictions in writing. If drainage backs up, gurgles unexpectedly, or wastewater appears after service is restored, stop using the affected fixtures and contact the contractor.
For a broader explanation of your options, see what trenchless sewer repair means and who to call if the problem worsens.
Bottom line: Water coming in and wastewater going out are different systems. Plan around the drain-use restrictions the crew actually gives you.