Sewer backup: what is happening in the pipe
The main line carries all the waste from the house to the sewer main or the septic tank. When it blocks, the lowest fixtures show it first: the basement floor drain, a first-floor shower, the laundry standpipe. Water backs up there because it has nowhere else to go.
The causes are familiar. Grease and wipes that were flushed collect at bends. Roots enter through joints in older pipe and form a mat that catches everything. A section that has sagged, called a belly, holds water and waste. Sometimes the pipe has collapsed. Our sewer line repair page explains when cleaning is not enough.
Sewer or septic: how the call differs
The service is similar, but the questions and the next steps are not. In Guilford the right-hand column applies, because the town has no municipal sewer.
| Question | House on municipal sewer | House on septic tank |
|---|---|---|
| Where does the waste go? | To a sewer main, usually in the street | To a tank and leach field on your property |
| Who owns the blocked pipe? | You own the line to the main, the municipality owns the main | You own the entire system |
| First check | Cleanout and camera | Tank level, pump-out history and line to the tank |
| Warning sign beyond the house | Neighbors with the same problem | Wet or smelly ground over the leach field |
| Next step if the line is clear | Report to the sewer authority if the main is the cause | Call a septic pumper and the health department if the system has failed |
Sewage backup: the safe steps
Sewage carries bacteria, so treat it with care.
- Stop all water use. Do not flush, run the washer or use the dishwasher.
- Keep people and pets out of the wet area. Children and pets should stay out until the area is cleaned.
- Turn off power if water reaches outlets or appliances. Only if you can reach the panel while standing on a dry surface.
- Do not use the basement bath or floor drain. They are the backup points.
- Call the 24/7 line and photograph the damage. Photos help with an insurance claim.
Guilford runs on septic systems, and the town sets the rules
Guilford's 2015 plan of conservation and development says the town does not have sewers, and the Guilford health department says sewage disposal is handled on-site by individual septic systems and community systems. Its page also says every septic system must be pumped every five years and that, based on lot size and soil suitability, several areas of town must be inspected yearly.
The health department asks pumpers to return a record of each cleaning, and it says septic repairs need a health department permit and a licensed septic contractor. That is the dividing line for us. A plumber clears and repairs the pipes in the house and the line to the tank. The tank, the leach field and any pumping belong to septic professionals working under that permit.
If the tank is the problem, a plumber can confirm that the house line is clear and say when to call a pumper. See our location pages for Madison and Clinton for how those towns handle it.
Cleaning methods for the main line
A drain cable machine with a root cutter head clears most main line blockages. For heavy buildup, hydro jetting flushes the pipe wall after the cable has opened a path. A camera confirms the pipe is clear and shows whether it has damage. Cleaning without a camera is a guess when the line is old or the problem keeps returning.
If your house has no cleanout, the plumber may install one as part of the visit. A cleanout is a capped pipe that gives direct access to the main line, and it makes every later visit cheaper and faster.
What affects the price of sewer line cleaning
A clear price comes before work starts. These factors move it.
- Access to the line.With a cleanout, setup is quick. Without one, the plumber works through a toilet or roof vent.
- Length and depth.A main that runs sixty feet to the street is more involved than a short run.
- Cause of the blockage.Roots, grease and a collapsed pipe need different tools.
- Camera inspection.Often added to confirm results.
- When you call.After-hours visits are quoted as emergencies.
Sewer backup coverage is often a separate endorsement on a homeowners policy. Check yours and keep photos. A pumper's invoice is separate from the plumber's.
Sewage backing up now?
Call the 24/7 line, stop using water and say whether the house is on sewer or septic. If the problem is outside the building, tell the dispatcher about neighbors who are affected.
Questions we hear on calls
Yes. A sewer backup is one of the most common after-hours emergencies and the line is open 24/7. Appointment times depend on how many emergencies are open.
No. The town's plan says Guilford does not have sewers, and the health department says disposal is handled on-site. If you are not sure what your property uses, ask the health department.
In Guilford you own the whole on-site system. A camera inspection shows whether the blockage is in the line, and a septic professional checks the tank and field.
Yes. They do not break down like paper and collect at bends and roots. Put them in the trash.
Often only with a separate water backup endorsement. Check your policy.
The plumber can confirm the house line is clear and tell you when to call a septic pumper.
Yes. See commercial plumbing for what we do for shops, restaurants and offices.
Sources for the local details on this page
The local facts above come from the Guilford Health Department environmental health page, Guilford plan of conservation and development and 2022 Connecticut State Building Code. Rules and figures can change, so check with the town or state office before you rely on them for a permit or a purchase.