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46 Years
experience
Emergency
services
Your Trusted Plumbing & Heating Experts in Westchester County
Since 1980, Herlihy Plumbing & Heating has been dedicated to providing comprehensive plumbing and heating solutions for residential and commercial clients across Westchester County, NY. Our team of licensed master plumbers brings decades of combined experience to every project, specializing in backflow prevention, gas line installation, boiler systems, and emergency repair services. As NYSDOH-certified backflow testers, we ensure compliance with public water safety standards while maintaining a commitment to environmental sustainability through energy-efficient system design.

Our founder, Randall Herlihy, combines technical expertise with personal accountability, having served as Chief Plumbing Inspector for Sleepy Hollow and maintaining certifications in gas operations and renewable energy systems. With a proven track record of resolving complex plumbing challenges, we prioritize transparent communication and long-term client relationships, as evidenced by decades of repeat business and referrals from satisfied homeowners and commercial property managers.
Services
Residential Plumbing Commercial Plumbing Backflow Prevention Heating Systems Gas Line Installation
Details
  • Year established: 1980
Highlights and features
  • 40+ years serving Westchester County with licensed master plumbers
  • NYSDOH-certified backflow prevention specialists
  • Emergency repair services available 24/7
  • Proven expertise in commercial building systems
  • Commitment to sustainable energy solutions
Associations and certifications
  • NYSDOH (New York State Department of Health)
What people say
Timely response Top-notch work Dependable service Fair pricing Expertise
Services
Residential Plumbing
Comprehensive residential plumbing solutions including fixture replacement, gas line installation, and boiler system upgrades. Our licensed technicians handle emergency repairs, renovations, and preventive maintenance for homeowners across Westchester County. With 40+ years of local experience, we ensure code-compliant installations and long-lasting repairs for kitchens, bathrooms, and heating systems.
Commercial Plumbing
Specialized commercial plumbing services for multi-family buildings, schools, restaurants, and office complexes. Our team manages large-scale systems including waste/vent piping, boiler installations, and backflow prevention compliance. We provide scheduled maintenance and emergency repairs to minimize business disruption while maintaining regulatory compliance for Westchester County commercial properties.
Backflow Prevention
NYSDOH-certified backflow testing and prevention services for residential and commercial properties. We install, test, and maintain backflow devices to protect public water systems from contamination. Our technicians ensure annual compliance inspections meet local health department requirements while providing emergency repair services for faulty devices.
Heating Systems
Complete heating system solutions including boiler installation, repair, and maintenance for oil and gas systems. Our services cover both residential and commercial properties with a focus on energy efficiency and system longevity. We offer emergency heating repairs and preventive maintenance plans to ensure reliable winter operation.
Gas Line Installation
Professional gas line installation and maintenance for natural and propane systems. Our certified technicians handle residential and commercial gas piping projects with expertise in code-compliant installations for heating systems, appliances, and commercial equipment. We provide leak detection, pressure testing, and emergency gas line repairs.
People
Randall Herlihy
Owner / Master Plumber
Licensed master plumber with 40+ years of experience serving Westchester County. Former Chief Plumbing Inspector of Sleepy Hollow, NYSDOH-certified backflow tester, and Con Edison gas-qualified operator. Specializes in sustainable energy systems while maintaining expertise in traditional plumbing and heating solutions.
Questions
What areas do you service?
We serve all of Westchester County including Sleepy Hollow, Croton-on-Hudson, Yorktown Heights, Ossining, and Yonkers.
Are you available for emergency repairs?
Yes, we offer 24/7 emergency plumbing services for urgent issues like leaks and heating failures.
What certifications do your plumbers hold?
Our team includes NYSDOH-certified backflow testers and gas-qualified operators with Con Edison/D.O.T certifications.
Do you handle commercial plumbing projects?
Yes, we specialize in commercial systems for apartment buildings, schools, restaurants, and office complexes.
What backflow prevention services do you offer?
We provide annual testing, maintenance, and installation of backflow devices to ensure public water safety compliance.