Riverhead · Southold · Brookhaven · Smithtown · Suffolk County
Licensed Master Plumber Serving Suffolk County, NYProfessional Plumbing & Heating for Homes & Commercial Properties
Gemini Plumbing is your reliable father and son, family owned and operated plumber in the Towns of Riverhead, Southold, Brookhaven, Smithtown & all of Suffolk County. We bring over 30 years of experience on the East End and North Fork to all of Suffolk County.
Licensed & Insured
Master Plumber #MP-71893
Master Level Work
Without The Big Corporate Markup
Competitive Pricing
Fair Rates, No Hidden Fees
Residential & Commercial
All project sizes
Gemini Plumbing — Licensed Master Plumber in Suffolk County, NY
Gemini Plumbing is a licensed Master Plumber (License #MP-71893) and fully insured, family-owned and operated plumbing company serving the Towns of Riverhead, Southold, Brookhaven, Smithtown including all villages and hamlets within these towns. We provide boiler and water heater installations, drain cleaning and hydro jetting, leak and burst pipe repair, emergency no-heat service, faucet, toilet, sink and shower installation, well pump and sump pump installation, and new construction plumbing for residential and commercial properties across the North Fork, the Hamptons, and all of Suffolk County.
What We Do
Our Services
Water Heater Specialist & Boiler Specialist
Specializing in tankless, oil, gas and electric water heater installations and boiler installations in the towns of Riverhead, Southold, Brookhaven, Smithtown & all of Suffolk County. Boiler tune ups, boiler annual service and maintenance.
Learn moreLeak Repair, Drain Cleaning & Hydro Jetting
Keep your plumbing system flowing smoothly with professional leak repair, emergency burst pipe repair, drain cleaning, and hydro jetting services. Whether you have a leaking pipe, clogged sink, slow drain, backed-up shower, or recurring blockage.
Learn moreGeneral Plumbing
Full bathroom additions, faucet installation, toilet installation, sink installation, shower valve installation, full home re-piping, vacation home winterization, well tank installation, well pump installation and much more in the towns of Riverhead, Southold, Brookhaven, Smithtown & all of Suffolk County.
Learn moreHeating & Oil Burner Services
We service hydronic heating systems and the electrical systems ran on boilers, oil fired boilers or gas boilers. Emergency No Heat service, circulator pump installations and replacements, WiFi thermostat installations, zone switching relay installation, expansion tank installation, backflow preventer installation, oil burner service, oil burner replacements and more.
Learn more
What Our Customers Are Saying
Trusted by Suffolk County Homeowners
"I recently had Gemini Plumbing replace my old boiler, and I couldnt be happier with the experience. From start to finish, they were professional, honest, knowledgeable, and incredibly helpful. The team arrived exactly when they said they would, kept me informed throughout the entire process, and went above and beyond to ensure everything was completed properly. Their workmanship was outstanding, and it was clear they genuinely care about providing quality service and taking care of their customers. I would absolutely use Gemini Plumbing again in the future and highly recommend them to anyone in need of plumbing or heating services."
Pasquale I.
Verified Customer
"Reliable. Reasonable. Very nice. I couldn't be more pleased with everything. They made replacing my hot water heater a pleasant experience. I highly recommend you reach out if your in need of service."
Kimberly Corwin
Verified Customer
"Excellent service for an emergency after hour issue !! Solved the issue fast. Will recommend to everyone !!!"
Gabriella Bella
Verified Customer
FAQ
Plumbing Questions, Answered
What are the most common plumbing problems for homes in Suffolk County, NY?
In Suffolk County, the most common plumbing problems are aging galvanized and cast iron pipes in older homes, frozen and burst pipes during harsh winters, well pump and pressure tank failures in rural areas, hard water and iron or sulfur in private wells, salt air corrosion on waterfront plumbing, sump pump failures in low-lying and flood-prone areas, and water heater or boiler failures in heating season. Gemini Plumbing repairs all of these throughout Suffolk County, NY.
Why is my boiler not heating my house on the North Fork?
A boiler that runs but leaves the house cold often has a circulator pump, zone valve, air in the system, low pressure, or thermostat problem. Oil-fired boilers common on the North Fork and East End can also fail from fuel delivery issues, a dirty burner nozzle, or a tripped reset. Gemini Plumbing diagnoses and repairs gas and oil boilers, baseboard, and radiator heating systems across the North Fork and Suffolk County, NY.
How do I prevent frozen and burst pipes in my Suffolk County home?
To prevent frozen pipes, insulate exposed plumbing in crawl spaces and exterior walls, seal gaps where cold air enters, keep the heat on in seasonal and vacation homes, let faucets drip during extreme cold, and disconnect outdoor hoses. Waterfront and seasonal homes on the North Fork and Hamptons are especially vulnerable. Gemini Plumbing offers pipe insulation, winterization, and emergency burst pipe repair throughout Suffolk County, NY.
What should I do if my water heater is leaking or has no hot water?
A leaking water heater tank or no hot water usually means the tank is corroding, a heating element or burner has failed, or a valve is leaking. Rusty or discolored water and units over 10 years old are signs it is time to replace. Gemini Plumbing installs and replaces tankless, gas, oil, and electric water heaters across Suffolk County, NY, often with same-day replacement for emergencies.
Do homes on the North Fork need well pump and well tank service?
Yes. Many North Fork and rural Suffolk County homes rely on private wells, so well pump and pressure tank service is essential. Low water pressure, short cycling, air in the lines, or no water at all usually indicate a failing pump or pressure tank. Gemini Plumbing installs and replaces well pumps and well tanks throughout Suffolk County, NY.
How often should I have my drains cleaned in Suffolk County, NY?
Most Suffolk County homes benefit from professional drain cleaning every 1–2 years, though older homes with cast iron pipes, homes on private wells, and properties with trees near the sewer line may need it more often. Gemini Plumbing offers drain snaking, sewer camera inspection, and hydro jetting to clear grease, scale, and tree roots before they cause backups throughout Suffolk County, NY.
What is hydro jetting and when do I need it for my drains?
Hydro jetting uses high-pressure water to scour the inside of drain and sewer lines, removing grease, sludge, scale, and tree roots that a snake alone cannot clear. It is the best solution for recurring clogs, slow drains across multiple fixtures, and older cast iron lines with buildup. Gemini Plumbing performs hydro jetting and sewer camera inspection for homes and businesses across Suffolk County, NY.
Does Gemini Plumbing service oil burners and oil-fired boilers on the East End?
Yes. Oil-fired boilers are common on the East End and North Fork, and Gemini Plumbing provides oil burner service, nozzle replacement, burner replacements, and emergency no-heat service for oil heating systems. We also service circulator pumps, zone valves, expansion tanks, and backflow preventers across Suffolk County, NY.
Where We Serve
Service Areas
Plumber based in Southold, NY. Plumber based in Port Jefferson Station, NY — Gemini Plumbing is a plumber in the town of Riverhead, Southold, Brookhaven, Smithtown, East Hampton, Smithtown, the North Fork, South Fork (The Hamptons), and all surrounding communities across Suffolk County.