Stop guessing about what's wrong underground. A-1 Trenchless runs a high-definition sewer camera through your line to find breaks, roots, bellies, and blockages exactly — a free video inspection that tells you the real problem before anyone digs.

The most expensive sewer mistake is digging in the wrong place or replacing a line that only needed a cleaning. A camera inspection removes the guesswork. We feed a waterproof CCTV camera down the line and watch a live, high-definition feed of the pipe's interior — locating cracks, root intrusion, offset joints, sags (bellies), grease, and scale, and marking exactly how far down the line each problem sits.
That footage drives an honest recommendation: sometimes it's a simple cleaning, sometimes descaling, sometimes a spot repair, and sometimes a trenchless replacement. Either way, you see what we see and get a clear, upfront estimate. It's also essential before buying a home — a sewer inspection can reveal a five-figure problem hiding under the front lawn.

A-1 Trenchless is a WSSC-licensed, insured water & sewer contractor — the credentials required to legally work on sewer and water service lines across the DC metro.
We specialize in no-dig pipe bursting and lining, so most sewer lines are replaced without tearing up your yard, driveway, or landscaping.
We diagnose the real problem with a sewer camera first and give you a free, upfront estimate — no guesswork and no surprise charges.
From camera inspection to trenchless replacement or full excavation and lawn restoration, one experienced local crew handles the entire job.
From free camera diagnostics to descaling, hydro jetting, and trenchless replacement, A-1 Trenchless finds the problem and fixes it right.
Pipe bursting and CIPP pipe lining replace a failed sewer line with no digging up your yard — a brand-new pipe, often in a single day.
Mechanical descaling scours years of rust, scale, and buildup out of old cast-iron pipe, restoring full flow without a full replacement.
High-definition CCTV video inspection pinpoints breaks, roots, bellies, and blockages exactly — a free sewer video inspection before any work begins.
High-pressure water jetting cuts through grease, roots, and hardened debris to fully clear drains and main lines — far beyond what a cable snake can do.
Repair or replacement of leaking, aging, or lead water service lines — trenchless where the line allows, and restored clean when excavation is needed.
When a pipe is beyond repair, our own excavation crew replaces it and restores your yard afterward, including grading, seed, and straw.
Free estimates and a free sewer video inspection across Damascus · Montgomery County · the Greater Washington DC Metro.
Diagnose first, fix it cleanly, and leave your property restored.
Reach us at (301) 254-8401 — a real person helps you set up a visit and free inspection.
We run a sewer camera to find the exact problem and its location — no guessing.
You see what we see and get an honest price before any work begins.
We fix or replace the line — no-dig where possible, clean excavation when needed.
We test the line, backfill, and restore your yard — grading, seed, and straw.









Homeowners and home buyers rely on A-1 Trenchless because we diagnose before we dig. Our HD camera inspection pinpoints the exact problem and location, so you only pay for the repair you actually need — no guesswork, no unnecessary excavation.
Yes — A-1 Trenchless offers a free sewer video inspection to diagnose your line. You get a clear picture of the problem and an upfront estimate before committing to any repair.
Trusted by homeowners across Montgomery County & the DC metro
A-1 replaced our collapsed sewer line with pipe bursting — no trench across the yard. Camera inspection first, honest estimate, and done in a day. Saved our driveway and our lawn.
Recurring backups for years. A-1 hydro-jetted the main line and showed me the before/after on camera. Completely clear now. Wish I'd called them first.
Old cast-iron pipe was almost fully scaled shut. They descaled it instead of pushing a full replacement — flow is back to normal and they saved us thousands. Honest crew.
Free camera inspection found the exact break under the walkway. Trenchless replacement meant no demolition. Professional, licensed, and fair. Highly recommend.
Water service line was leaking and pressure was terrible. A-1 replaced it and restored the yard with seed and straw. You'd barely know they dug. Great work.
A-1 replaced our collapsed sewer line with pipe bursting — no trench across the yard. Camera inspection first, honest estimate, and done in a day. Saved our driveway and our lawn.
Recurring backups for years. A-1 hydro-jetted the main line and showed me the before/after on camera. Completely clear now. Wish I'd called them first.
Old cast-iron pipe was almost fully scaled shut. They descaled it instead of pushing a full replacement — flow is back to normal and they saved us thousands. Honest crew.
Free camera inspection found the exact break under the walkway. Trenchless replacement meant no demolition. Professional, licensed, and fair. Highly recommend.
Water service line was leaking and pressure was terrible. A-1 replaced it and restored the yard with seed and straw. You'd barely know they dug. Great work.
Bought an older home and had A-1 do a sewer camera inspection before closing. Caught a bellied line the home inspector missed. That inspection paid for itself many times over.
Prompt, WSSC licensed, and they explained everything with the camera footage. No upselling. Cleared a root-clogged line and gave me options. Trustworthy company.
Main sewer replacement done trenchlessly. The crew was respectful, clean, and finished faster than I expected. The yard was left in great shape. Would use again.
Descaling brought our 1950s cast-iron drains back to life. They camera-scoped before and after so I could see the difference. Excellent, honest service.
From the free estimate to the finished job, A-1 was straightforward and skilled. Trenchless sewer repair with zero damage to the landscaping. Couldn't be happier.
Bought an older home and had A-1 do a sewer camera inspection before closing. Caught a bellied line the home inspector missed. That inspection paid for itself many times over.
Prompt, WSSC licensed, and they explained everything with the camera footage. No upselling. Cleared a root-clogged line and gave me options. Trustworthy company.
Main sewer replacement done trenchlessly. The crew was respectful, clean, and finished faster than I expected. The yard was left in great shape. Would use again.
Descaling brought our 1950s cast-iron drains back to life. They camera-scoped before and after so I could see the difference. Excellent, honest service.
From the free estimate to the finished job, A-1 was straightforward and skilled. Trenchless sewer repair with zero damage to the landscaping. Couldn't be happier.
Want to Know Exactly What's Wrong? Get a Free Camera Inspection.
WSSC licensed #71483 · Free estimates & video inspection · Serving Montgomery County & the DC metro.
Call (301) 254-8401 for the fastest response, or send a message and we'll get right back to you with a free estimate and video inspection.
Water & Sewer Rehabilitation · WSSC Licensed #71483 · Insured
Mon–Fri: 8AM–5PM · Sat–Sun: Closed
Serving