From burst pipes to full repipes, Harbor Line Plumbing has kept Montgomery County homes flowing for 18 years. Owner-operated by Dave Kowalski — licensed, insured, and straight with every quote.
From urgent repairs to full projects, Harbor Line Plumbing handles it all with 18+ years of hands-on expertise across Montgomery County.
Tank, tankless, gas, or electric — we install, repair, and replace water heaters sized right for your household, usually within 24 hours of your call.
Learn More → 🌀Slow tub, backed-up kitchen sink, gurgling floor drain — we clear it with the right tool for the line, not just a bottle of chemicals that eats your pipes.
Learn More → 💧A mystery stain on the ceiling or a water bill that doubled overnight — we find the leak without tearing your house apart, then fix it right the first time.
Learn More → 🚿Remodeling, upgrading fixtures, or moving a sink? We handle the rough-in and the finish work so your remodel passes inspection and works beautifully.
Learn More → 🕳️Sewer trouble is the one plumbing problem you can't wait on. We camera, clear, repair, and replace main lines — with trenchless options where the yard allows.
Learn More → 🚨When the basement is taking on water or a pipe lets go at 10 PM, you need a plumber who picks up. Harbor Line responds fast to keep damage to a minimum.
Learn More →Harbor Line Plumbing is owned and operated by Dave Kowalski, a licensed master plumber with 18 years of hands-on experience across Montgomery County. When you call Harbor Line, the person who answers is the person who shows up — no dispatcher, no rotating crew of strangers.
We quote the job before we start it, we protect your floors like they're ours, and we don't leave until the water runs the way it should. That's why our customers call us back for the next project — and send their neighbors.
“Three plumbers told me I needed a whole new sewer line. Dave scoped it, showed me the video, and fixed the actual problem for a third of the price. That's honesty you don't forget.”
— M.T., via Nextdoor
Get A Free EstimateHarbor Line Plumbing provides expert residential plumbing services throughout Montgomery County and the surrounding areas.
Don’t just take our word for it — here’s what Montgomery County homeowners are saying.
“Water heater died on a Friday night — Dave had a new one in by Saturday afternoon. Fair price, cleaned up everything, walked me through the shutoffs before he left.”
“Three plumbers told me I needed a whole new sewer line. Dave scoped it, showed me the video, and fixed the actual problem for a third of the price. That's honesty you don't forget.”
“Repiped our whole 1940s twin in two days. Tarps everywhere, zero mess, water back on every night. Worth every penny.”
We serve all of Montgomery County, including Norristown, King of Prussia, Lansdale, Pottstown, Blue Bell, Collegeville, and the surrounding areas. Not sure if you're in range? Call and ask — odds are we cover you.
Yes. Every job gets a clear, written price before we start work. No surprise line items, no "while we're in there" upcharges without your okay.
Absolutely. Harbor Line Plumbing is fully licensed and insured in Pennsylvania, and we pull permits whenever the work requires them.
Yes. Burst pipes, sewer backups, and flooding basements can't wait for business hours. Call (610) 555-0142 and we'll walk you through shutting the water off while we're on the way.
A sudden spike almost always means a hidden leak — often a running toilet, a slab leak, or a failing service line. We can pinpoint the source without opening walls blindly, then give you a straight answer on the fix.
All the time — it's one of our specialties. Many Norristown-area homes still have original galvanized supply lines that corrode shut over decades. We repipe in copper or PEX, usually in one to two days, with water back on every night.
Let Harbor Line Plumbing handle it so you can get back to what matters. Licensed, insured, and trusted by your Montgomery County neighbors for over 18 years.
Tell us what you need and we’ll get back to you fast — usually the same day. Prefer to talk? Call or text anytime.