Long Island Plumber, Heating & HVAC

Licensed Master Plumber Serving Long Island

Karl's Plumbing Heating & Cooling serves homeowners and businesses across Long Island with the same dependable service we've provided to the New York City area since 1935. Our Licensed Master Plumbers and HVAC technicians handle residential and commercial projects throughout Nassau County and western Suffolk County — from routine plumbing repairs and water heater installations to emergency service and oil-to-gas conversions.

Long Island's mix of older homes and new construction means diverse plumbing and heating needs. Post-war Cape Cods and ranches with original plumbing, modern colonials with high-efficiency systems, and commercial properties along the Island's corridors all require a plumber who understands the full range of residential and commercial systems.

Long Island Communities We Serve

Nassau County: Great Neck, Manhasset, Port Washington, Roslyn, Garden City, Mineola, Floral Park, New Hyde Park, Franklin Square, Valley Stream, Rockville Centre, Lynbrook, Oceanside, Long Beach, Hempstead, Westbury, Hicksville, Syosset, Jericho, Glen Cove, and Oyster Bay.

Western Suffolk County: Huntington, Melville, Farmingdale, Babylon, Lindenhurst, Amityville, Massapequa, and surrounding communities.

Plumbing Services on Long Island

• 24/7 Emergency Plumbing — Burst pipes, flooding, gas leaks, and sewer backups for Long Island homes and businesses
• Residential Plumbing — Full-service plumbing for Long Island homes of all ages and construction types
• Commercial Plumbing — Office buildings, restaurants, medical facilities, and retail spaces
• Pipe Repair & Replacement — Replacing aging galvanized pipes and cast iron drain lines in older Long Island homes
• Gas Line Services — Gas line installation, repair, and extension for stoves, dryers, outdoor grills, fire pits, and pool heaters
• Backflow Testing — Required annual testing for properties with irrigation systems, fire suppression, and commercial connections
• Water Leak Detection and Slab Leak Repair — Non-invasive leak detection and under-slab repairs
• Toilet Repair & Installation, Shower & Bath Installation, and Frozen Pipe Repair

Heating Services on Long Island

Many Long Island homes still use oil heat. As oil prices fluctuate and clean heating incentives grow, oil-to-gas conversion is one of the most requested services for Long Island homeowners. Karl's handles the entire process — from National Grid coordination through installation and oil tank removal.

• Oil-to-Gas Conversion — Our most popular Long Island heating service. Complete conversion including permits, oil tank removal, new gas boiler or furnace installation, and utility coordination
• Boiler Repair & Replacement — Gas and oil boiler service for Long Island homes
• Furnace Repair & Installation — Gas, oil, and high-efficiency furnace service. Long Island's many homes with forced-air heating make furnace service a core part of our work
• Water Heater Service — Tank and tankless water heater installation and repair
• Radiant Heating, Radiant Snow Melt, and Heated Driveways — Popular comfort upgrades for Long Island homes

Drain & Sewer Services on Long Island

• Drain Cleaning — Kitchen, bathroom, and main drain line clearing
• Sewer Repair — Sewer line repair and replacement
• Hydro Jetting — High-pressure cleaning for stubborn clogs and tree root intrusion
• Video Camera Inspections — Essential before buying a home or diagnosing recurring drain issues
• Trenchless Sewer Line Repair — Replace sewer lines without destroying your yard or driveway
• Sump Pumps — Installation, repair, and battery backup systems. Critical for Long Island homes in flood-prone areas and with high water tables

HVAC & Air Conditioning on Long Island

• Central AC Installation & Replacement — Most Long Island homes have ductwork, making central AC the primary cooling option
• Ductless Mini Split AC — Perfect for additions, finished basements, and above-garage rooms without ductwork
• Residential AC Service — Repair, maintenance, and seasonal tune-ups
• Commercial HVAC — Full commercial HVAC service for Long Island businesses

24/7 Emergency Service on Long Island

Plumbing emergencies don't keep business hours. Karl's provides 24/7 emergency plumbing and heating service to Long Island. Call (800) 721-3200 any time for immediate assistance with burst pipes, gas leaks, sewer backups, boiler failures, and no-heat emergencies.

Why Long Island Homeowners Choose Karl's

• Four generations, since 1935 — Nearly 90 years of trusted service in the greater NYC area
• Licensed Master Plumbers — NYC DOB Licenses #921 and #2060
• Oil-to-gas specialists — Extensive experience converting Long Island homes from oil to gas heating
• All paperwork and permits handled — We coordinate with utilities and handle all required permits and filings
• Fully insured — Complete liability and workers' compensation coverage

Do you serve all of Long Island?

We serve Nassau County and western Suffolk County (roughly Huntington to Massapequa). For locations farther east, call us at (800) 721-3200 to discuss your project — we may be able to help depending on the scope of work.

Need a plumber on Long Island? Request service online or call (800) 721-3200.