4 services · New Hampshire
Drains & sewer in New Hampshire
Older mill-city buildings in Manchester and Nashua have cast-iron drains and shared sewer laterals, so a clog affects every unit in a triple-decker or tenement block.
- Licensed local plumbers
- The problem explained before work starts
- Price agreed before the job begins
Statewide conditions
Drains & sewer in New Hampshire: what to know
Parts of older cities have combined sewers that can back up basement drains during heavy rain, and many rural homes use septic systems instead of public sewer.
A camera inspection shows whether a recurring clog is roots, a crack or a shared-line problem. A backwater valve helps in homes that see storm backups.
- Climate
- Hard freezes are a regular part of winter in New Hampshire, so pipes in exterior walls, garages, crawl spaces and attics need protection every year, and outdoor faucets and sprinkler lines must be drained before the first freeze.
- Typical foundations
- Many homes are older and rely on private wells and septic systems, and most have basements. Most common: basements.
Drains & sewer services
Drain cleaning
If one fixture is slow, the clog is usually in that fixture's branch line. If several drains back up at once, or the basement floor drain fills when you run the washer, the main sewer line is blocked and needs a larger cable or a jetter.
Hydro jetting
Hydro jetting cleans the full width of a drain pipe with high-pressure water, washing out grease, scale and fine roots that a cable only punches a hole through. It works best on sound pipe and is usually done after a camera inspection confirms the pipe can take it.
Sewer camera inspection
A sewer camera inspection runs a waterproof camera through the line from your house to the city main and records what it finds: roots, cracks, sags, offset joints or collapsed pipe. It's the best way to decide between cleaning, spot repair and replacement.
Sewer line repair
A damaged sewer line can be fixed with a spot repair, a trenchless liner, pipe bursting or an open-trench replacement. Which one fits depends on what the camera shows, how deep the pipe is, and what's on top of it, such as a driveway, trees or landscaping.
Drains & sewer by city in New Hampshire
Local pages cover each city's water provider, permit office and housing. Not listed? Check your ZIP code below.
Drains & sewer questions in New Hampshire
Is my New Hampshire drain problem a septic issue?
Are chemical drain cleaners safe to use?
How these problems start and how to choose between repair options is covered in the drains & sewer guide.
More plumbing in New Hampshire
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