Sewage & Backup Cleanup
We clear the blockage, remove the contaminated materials, clean and treat what stays, and dry the structure — the drain work and the cleanup from one crew.
Registered Washington general contractor and licensed plumbing contractor, both under UBI 605495157
What do you do about a sewage backup?
A sewage backup is category three contaminated water, which means porous materials it soaked are removed rather than dried, and the blockage or pump failure that caused it has to be repaired before cleanup is worth doing.
A sewage backup is contaminated water, and it is handled completely differently from a clean water leak. Anything porous it soaked — carpet, pad, drywall that wicked it up, particleboard, upholstered furniture — has to be removed rather than dried, because cleaning cannot be verified inside a porous material. We clear the blockage or repair the failure that caused the backup under our own plumbing licence, remove what cannot be decontaminated, clean and treat the hard surfaces that stay, then dry the structure. The drain work and the cleanup come from the same crew.
What is included
- Blockage clearing and drain repair — root intrusion, main line failure, failed ejector pump
- Extraction of contaminated water with dedicated equipment
- Removal and disposal of porous materials the water reached
- Cleaning and antimicrobial treatment of hard surfaces and framing
- Structural drying of the affected area once the contamination is out
- Photo documentation of the extent and the materials removed, for your claim
Call us if
- A floor drain, basement, shower or toilet has backed up
- A sewer smell has come up through a drain and you have standing water
- A septic system or sewage ejector pump has overflowed
- A main line blockage keeps returning after being snaked
How we do it
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Get people and pets out of it
Before anything else: keep the area clear, especially children and anyone with a compromised immune system, and do not run water into the affected drains.
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Clear the cause
A backup has a reason — a root mass in the side sewer, a collapsed or bellied section, a grease blockage, a failed ejector pump. We clear or repair it under our plumbing licence, because cleaning a floor that is about to flood again is wasted work.
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Extract the contaminated water
Removal of the standing water and the sludge with equipment kept for this work, never the same gear that touches clean-water losses.
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Remove the porous materials
Carpet and pad, drywall that wicked, insulation, particleboard cabinet bases and upholstered items the water reached. Decontamination cannot be verified inside a porous material, so it goes.
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Clean and treat what stays
Hard surfaces, framing and concrete get cleaned and then treated with an antimicrobial, after the solids and the soiling are physically gone.
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Dry, document and rebuild
The structure gets dried the same way as any water loss with moisture readings logged, the whole job photographed for your insurer, and the finishes put back under our contractor registration.
Do not do these things yourself
- Do not run a household vacuum or a shop vac through sewage. You will aerosolise it and the machine is then a contaminated item.
- Do not try to save soaked carpet, pad or upholstered furniture. There is no way to verify it is clean inside and it is not worth the risk.
- Do not keep flushing or running water to see if it has cleared. Every gallon goes where the last one went.
- Shut down an affected HVAC system rather than running it. A return air register in a contaminated room will distribute the problem.
- If the backup came from the municipal main rather than your own line, tell your city or sewer district as well — some have claim processes for that.
What this costs
We do not publish prices, and we are not going to pretend a range would help you. The scope of a water loss depends on how much material got wet, how long it stayed wet, what has to come out and what can be dried in place, none of which anyone can know from a web page. Call and describe what you are seeing and you will get a straight answer about what is involved, with the scope confirmed once someone has actually looked at it.
If you are going through insurance, the useful thing to know is that mitigation and reconstruction are priced and settled separately. How a water damage insurance claim works walks through who pays what, and in what order.
Sewage & Backup Cleanup FAQ
Why can't the carpet be cleaned and saved?
Because you cannot verify the inside of a porous material. Carpet backing and pad hold contaminated water in a structure nobody can inspect or confirm clean, so standard practice is removal and disposal. Hard surfaces are a different matter and are cleaned and treated in place.
Can you fix what caused the backup too?
Yes, and that is the reason to use one crew. Root intrusion in an older side sewer, a bellied or collapsed line, a grease blockage or a failed sewage ejector pump are drain problems, and we hold the plumbing licence to deal with them on the same visit as the cleanup.
Is a sewage backup dangerous?
Treat it as a health hazard rather than a mess. It carries bacteria and other pathogens, it can aerosolise when disturbed, and the risk is higher for small children, elderly people and anyone immunocompromised. Keep everyone out of the area and call.
Does insurance cover a sewer backup?
Often only if you carry a specific sewer or water backup endorsement, which many standard homeowners policies exclude by default and sell as an add-on. Read the declarations page for backup coverage. We document the loss fully either way.
My basement floor drain backs up every winter. Is that normal?
It is common in older King County neighbourhoods and it is not something to live with. A recurring seasonal backup usually means root intrusion or a bellied section of side sewer that only fails once groundwater is high. A camera inspection of the line tells you which.
A sewage backup is a health hazard, not a mess.
WA Mitigation serves King County, Washington. Licensed, bonded and insured under WA UBI #605495157.