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IS Plumbing is your licensed plumber in Marlborough, MA — covering Downtown Marlborough, French Hill and the Fort Meadow area with plumbing, water heater and boiler installation, gas fitting and drain work.
Marlborough pairs a historic downtown and older French Hill triple-deckers with a wave of newer homes and condos near the I-495 and Route 20 corridors. That mix keeps us doing everything — repiping older homes, swapping water heaters and boilers, gas fitting, drain cleaning and full bathroom remodels — always permitted, inspected and tidy.
Marlborough mixes a genuine small city — downtown blocks with triple-deckers and two-families dating to its shoe-factory era — with the tech and office corridor along I-495. In the older stock we do the classic work: repipes, cast-iron drain replacement, boiler swaps. Along the corridor it's light-commercial plumbing — tenant fit-outs, water heaters, backflow assemblies.
The city runs its own water system, and permits file with the City of Marlborough. A recurring Marlborough project for us is the two-family upgrade: separating shutoffs, replacing a shared water heater with per-unit units, and bringing gas piping up to code as part of a conversion or refinance.
"We hired IS Plumbing to replace a number of fixtures and toilets. Very professional crew and a great job. Highly recommend them for all your plumbing needs."
"Great experience — they installed an automatic smart water shut-off, did a full boiler maintenance with warranty parts, and explained everything clearly."
"IS Plumbing is by far the best plumbing company I've ever used. I've owned my home about 35 years and tried several plumbers around MetroWest — these guys are on another level."
Call +1 (774) 486-0909 — answered 24/7 for emergencies — or send a request with a photo of the problem.
We find the actual cause first, then give you an honest, upfront quote before any work starts. No surprises at the end.
Licensed and insured work, pulled under the proper Marlborough plumbing or gas permit and inspected — and the site left clean.
Based in Millbury, MA, we cover all of Marlborough and the surrounding towns. Don't see your street? Call +1 (774) 486-0909 and ask.
Yes. Burst pipes, no heat and no hot water are treated as emergencies — we answer 24/7 with same-day visits across Marlborough.
Always. Plumbing and gas work in Marlborough is pulled under the proper City of Marlborough permits and inspected.
Yes. We install and replace tank and tankless water heaters and high-efficiency boilers throughout Marlborough, sized for your home.
Yes. As licensed gas fitters we install gas lines and piping, stove and dryer hookups and oil-to-gas conversions — permitted and inspected.
Yes. French Hill's older triple-deckers often still run galvanized supply lines and cast-iron drains — repiping and drain replacement is everyday work for us.
From our shop in Millbury, MA we serve Marlborough and the surrounding towns across the Worcester area, MetroWest and Greater Boston. Don't see your town listed? Call and ask.
Free quotes for scheduled work · 24/7 line for emergencies.
