Your sewer cleanout is almost always in one of two places. Start by checking the basement, especially near the main drain or house trap. If you don’t find a cleanout inside, look outside near the foundation or along the sewer line toward the street.
Check both.If you still can’t find it, here’s what to check next.
- Look inside first, then along the foundation, then toward the street.
- In older NYC homes, a cleanout may be hidden beneath flooring, concrete, or landscaping.
- If you can’t locate the cleanout, a licensed plumber can help. If sewage is backing up and you suspect a problem with the city’s sewer system, report it through NYC 311.
- Before digging in NYC, contact New York 811 at least two full working days in advance. Privately owned sewer lines may require a separate locating service.
Table of Contents
- What is a Sewer Cleanout?
- Where to Look for A Sewer Cleanout
- How to Find Your Sewer Cleanout in 5 Steps
- Can’t Find You Sewer Cleanout
- How to Prevent Sewer Backup
- When to Call a Plumber
- How Balkan Can Help
- Sources
- FAQ
What is a Sewer Cleanout?
A sewer cleanout is a capped opening that gives plumbers access to the sewer line carrying wastewater from your building to the city sewer main. Many residential cleanouts have a 3- or 4-inch opening with a removable plug or cap, although sizes vary. A plumber can use this opening to inspect the sewer line or clear a blockage, often without digging up the yard or opening a wall.
Outside, a cleanout may look like a capped pipe near ground level. Inside, look for a threaded plug on the main drain or an access pit near the house trap. Some cleanouts are hidden beneath removable covers.
Where to Look for a Sewer Cleanout
- Homes with basements: Check near the bottom of the main drain stack, where the sewer line exits the foundation, or near the house trap.
- Homes with crawlspaces: Look along the main drain near the foundation wall.
- Homes built on slabs: Check for an accessible cleanout outside or near where the main drain exits the building.
In many older NYC homes, the cleanout is located near the house trap. Look for a fresh-air inlet near the front foundation wall. It may have a metal grate or a downward-facing pipe opening. The house trap and its cleanout plugs are often nearby, sometimes inside an access pit. Outside, check areas where concrete has been patched or landscaping may have covered the pipe.
Sewer cleanout caps and plugs come in different sizes and materials, including cast iron and PVC. Older metal plugs can also rust or become difficult to remove. If you’re unsure what you’re looking at, our guide to sewer cleanout cap and plug types explains where to find them, how to identify them, and when replacement may be necessary.
If you don’t see a cleanout, check for areas where concrete, flooring, or landscaping may have covered an older access point. If you still can’t find it, a plumber can help locate a buried or concealed cleanout.
How to Find it, Step by Step
- Check the basement or crawlspace. Find the main drain pipe and follow it toward the foundation wall. Look for a cleanout plug near the bottom of the pipe or around the house trap. Use a flashlight to check behind appliances or shelving.
- Check outside near the foundation. Look along the front of the building and toward the street. Check around landscaping, sidewalks, and any visible pipe openings. In older NYC homes, the fresh-air inlet may help you locate the house trap and nearby cleanouts.
- Check your property records. Old plumbing plans, permits, or inspection reports may show where the sewer line runs. They won’t always identify the cleanout, but they can help narrow your search.
- Contact New York 811 before digging. Call at least two full working days before starting excavation. Utility companies will mark their underground lines at no charge. Private sewer lines and cleanouts may require a separate locating service.
- Call a plumber if the cleanout is buried. If it’s under concrete or deep underground, don’t try to uncover it yourself. A plumber can locate the pipe before excavation begins.
Don’t remove an unfamiliar pipe cap. Have a plumber identify it first.
Can’t Find Your Sewer Cleanout?
A plumber can use electronic locating equipment to trace an underground sewer line. A small transmitter, called a sonde, is inserted into the pipe and tracked from above ground. This helps identify where the line runs without digging just to find it. A sewer camera can also check for cracks, blockages, and other damage inside the pipe.
If sewage is backing up into your NYC property, report the problem through 311. The Department of Environmental Protection (DEP) can investigate whether the backup involves the city’s sewer system. If DEP finds a problem with your private sewer service line, you may receive a Notice to Repair. NYC property owners are responsible for maintaining and repairing the sewer lines connecting their buildings to the city main.
How to Prevent Sewer Backups
Once you find the cleanout, take a photo and measure its distance from a nearby wall or another fixed point. Save the information so you can easily find it again if you need sewer service.
You can also lower the risk of sewer backups with a few basic precautions:
- Keep grease and wipes out of drains. NYC DEP warns that cooking grease and wipes, even those labeled “flushable,” can clog sewer pipes. Dispose of grease in the trash and never flush wipes down the toilet.
- Check roof drains and sump pumps. Rainwater entering sanitary sewer lines through improper connections can increase the risk of backups during heavy storms. Have a licensed plumber check any connections you’re unsure about.
- Schedule a sewer camera inspection if backups keep happening. A plumber can check for blockages, cracks, or damage in older cast-iron sewer pipes.
When to Call a Plumber
You can look for a sewer cleanout yourself, but leave buried pipes and unfamiliar fittings to a licensed plumber. If sewage is backing up, don’t remove the cleanout cap. Wastewater may spill out when it’s opened.
How Balkan Can Help
Can’t find your sewer cleanout? Balkan Sewer & Water Main helps NYC property owners locate underground sewer lines, inspect damaged pipes, and handle sewer repairs and replacements.
Balkan provides emergency sewer service throughout NYC. Whether you’re dealing with a sewer backup or need help locating an underground line, contact our team to discuss the problem and your repair options.
Sources
- Sewer Backups
- Broken Sewer Lines
- New York 811 – Homeowners
- NYC DEP – Safe Disposal of Harmful Products
- Balkan – How to Find Your House Sewer Trap
FAQ
Where should a sewer cleanout be located?
A sewer cleanout is usually installed where a plumber can access the main drain or sewer line. In NYC homes, that may be near the house trap, in a basement, or outside near the foundation.
Where can I find my sewer cleanout?
Check the basement near the main drain and house trap first. Outside, look near the foundation or fresh-air inlet. If the cleanout is buried or covered, a plumber can help locate it
What do old sewer cleanouts look like?
Older sewer cleanouts may have cast-iron fittings with metal threaded plugs. Some plugs have a square or raised fitting that allows them to be removed with a wrench.
Where is the cleanout plug located?
The cleanout plug is usually located near the bottom of the main drain pipe in your basement or near the house trap. Outside, check near the foundation or where the sewer line runs toward the street. In older NYC homes, the plug may be inside a floor-level access pit or hidden beneath a cover.
What if my house doesn’t have a cleanout?
If your sewer line doesn’t have an accessible cleanout, a licensed master plumber can determine whether one can be installed. NYC property owners are responsible for maintaining their private sewer lines.
