Cohasset · Drain Cleaning
Slow tub, gurgling toilet, or a basement drain backing up in Cohasset? Find out whether the clog is in your pipes, a grinder pump, or a septic tank, then call to reach an independent plumber.
Cohasset, Massachusetts
A clogged drain in Cohasset isn't always just a clogged drain. Depending on the street, your wastewater may flow by gravity into one of the town's two sewer districts, be pushed uphill by a grinder pump that the Sewer Commission owns, or end up in a septic tank in the yard. The same slow toilet can mean a hair clog, a pump struggling with wipes, or a tank that needs pumping.
That matters for what you pay and who you call. The Sewer Commission has had a one-strike policy on its grinder pumps since December 18, 2018: after the first clog caused by wipes, floss, or similar items, later service calls are charged to the resident. A plumber's snake won't help a jammed town pump, and a septic problem may need a pumper, not a drain cleaner.
Tell us what's happening and you'll be connected with an independent plumber who clears drains in Cohasset. We refer; the plumber you reach does the work and sets the schedule.
When the tub, toilet, and sink all drain slowly at once, the blockage is past the branch lines, in the main or beyond it.
Bubbling in a nearby toilet or floor drain while the washing machine empties suggests air is being forced past a partial clog in the main line.
A kitchen line that needs plunging every few weeks often has grease built up along the pipe wall, which a plunger can't reach.
On a septic home, a sewage smell outside or wet ground over the tank or field calls for a septic inspection along with the drain work.
Local knowledge
Three local facts that decide who clears a Cohasset clog and who pays for it.
Grinder Pump Policy
As shown on the Sewer Department page archived in February 2026, the one-strike policy applies to town-owned grinder pumps. The first clog from items like wipes or floss is handled by the town; after that, the homeowner pays. Even 'flushable' wipes belong in the trash in these homes.
Source: Cohasset Sewer Department (archived page, February 2026)
Septic Homes
Cohasset is a mix of sewer and septic, and the Board of Health posts the state Title 5 code along with the town's own supplemental rules, per its page archived in March 2026. On a septic home, slow drains throughout the house can be a full tank or a failing field rather than a pipe clog.
Source: Cohasset Public Health Department (archived page, March 2026)
Ten Pump Stations
The Sewer Department page, as archived in February 2026, describes 60 miles of pipeline, ten pumping stations, and a membrane treatment plant. When several homes on a street back up together, the problem may be in the town system, and the Sewer Commission should hear about it first.
Source: Cohasset Sewer Department (archived page, February 2026)
Right now
A few careful steps keep a clog from turning into a backup.
If wastewater has come up into a basement or bathroom, keep people and pets out of it and don't wade through it barefoot. Stay away from any outlets or cords the water has reached.
Hold off on laundry, showers, and the dishwasher. On a grinder pump or septic system, every gallon you add has to go somewhere, and right now it's going back toward the house.
Caustic drain products sit in the pipe if they don't clear it, which makes the plumber's job riskier. They can also harm the bacteria a septic tank depends on.
Note which fixtures are affected, whether you're on sewer, septic, or a grinder pump, and when the tank or pump was last serviced. It helps the plumber choose the right tools.
What to expect
Most visits start at the fixture or the nearest cleanout. The plumber clears the line with an auger or a water jetter, runs water to confirm it flows, and may push a camera down the pipe if the clog keeps returning or the line is old. In a house built before 1940, as roughly 28% of Cohasset's housing was, the camera often shows a mix of cast iron, clay, and newer plastic.
If the plumber decides the blockage is in a town grinder pump or the town sewer, they'll usually stop and point you to the Sewer Commission. On a septic home, they may recommend a pumping and inspection. Routine drain clearing doesn't usually need a permit, but replacing a damaged section of drain pipe can, and Building & Inspections handles those.
Hire smart
Plumbing and gas fitting in Massachusetts require a license from the Board of State Examiners of Plumbers and Gas Fitters, and most plumbing work needs a permit from the town's plumbing inspector.
Plumbing work in Massachusetts requires a license from the Board of State Examiners of Plumbers and Gas Fitters. Check the number on the state's license lookup.
A good answer covers testing with water and, for repeat clogs, a camera look at the line so you know whether the pipe itself is damaged.
Make sure the plumber has worked on homes like yours and knows when to hand off to a septic company or the Sewer Commission.
If the camera shows a cracked or root-filled pipe, ask for the repair in writing with permit costs listed, then take time to compare.
Costs
Price follows where the clog is and how hard it is to reach. A sink trap is a short job; a main line with no accessible cleanout, roots in an old clay pipe, or a camera inspection adds time and equipment. If a town grinder pump is involved, the first clog from wipes or floss shouldn't be your bill at all, so check with the Sewer Commission first.
Ask whether the quote is a flat rate or by the hour, whether a camera inspection is included, and whether you'll get the video. If a repair is recommended, get it written up separately from the cleaning.
More help in Cohasset
Every page below is written for Cohasset homes. Or start from the Cohasset plumbing guide.
Learning Center
A short list of the right questions tells you more about a plumber than any ad. Use these on the phone, during the site visit, and before you sign off on an estimate.
Read the guide
Massachusetts has some of the clearest plumbing rules in the country. Here is how to use them to pick a plumber with confidence, whether the job is a dripping shutoff or a full repipe.
Read the guideQuestions
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No. Under the one-strike policy the Sewer Commission adopted on December 18, 2018, the first clog in a town-owned grinder pump caused by wipes, floss, or similar items is handled by the town, and later ones are charged to the resident. Keep those items out of the toilet to stay clear of the bill.
A sewer bill from the town means you're in one of its sewer districts. If you don't get one, you're likely on septic, and the Board of Health keeps septic records. A plumber can also check where the main line leaves the house.
Harsh chemical openers can upset the bacteria a septic tank needs and may damage older pipes. For a stubborn clog, mechanical clearing by a plumber is the safer route. Ask the plumber or your septic company before adding treatments to the tank.
Ask for one when the same line clogs repeatedly, when several fixtures back up together, or before buying an older house. The video shows whether the pipe is cracked, sagging, or full of roots, which plunging and snaking can't fix.
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