Plumbing & Heating Services in Mercer County, NJ

  • Fast, Reliable, Available 24/7

    For decades, Rainbow Plumbing & Heating has been the name local homeowners and businesses trust for quality plumbing and heating across Central New Jersey. Family-owned, fully licensed, and always on call — we deliver fast, professional solutions with upfront, flat-rate pricing and a neighborly touch. From water heaters and sump pumps to emergency repairs, our team makes it easy to get help when you need it, at a fair price you can count on.

What We Do

Our Services

When plumbing problems strike, you need a solution you can trust. Our core services keep Central NJ homes and businesses running smoothly — 24/7. Count on us for:

Water Heater Replacement & Installation

Sump Pump Installation & Repair

Emergency Plumbing

Drain Cleaning & Sewer Line Repair

Fixture Install & Repair

Boiler Services

Local Plumbing & Boiler Service You Can Reach

When something breaks, you don’t want a call center—you want a licensed professional who answers and shows up. Rainbow Plumbing & Heating provides plumbing and heating services Mercer County NJ homeowners rely on for responsive service, clear communication, and professional workmanship.


We serve Princeton, Trenton, Hamilton, Lawrence Township, West Windsor, Ewing, and surrounding Mercer communities with both plumbing and hydronic boiler heating expertise under one licensed team.

Emergency Plumbing & No-Heat Response

Burst pipe? Sewer backup? No heat during a winter cold snap? We prioritize urgent calls throughout Mercer County.



As your emergency plumber Mercer County, we respond quickly to stabilize the issue, explain your options clearly, and restore safe operation. Whether it’s a late-night leak or a boiler breakdown in January, you can reach us directly.

Full-Service Plumbing & Heating Solutions

We handle a wide range of residential and light commercial needs, including:


  • Water heater replacement Mercer County
  • Boiler repair Mercer County (steam & hot water systems)
  • Sump pump installation Mercer County
  • Drain cleaning Mercer County
  • Sewer line repair Mercer County
  • Fixture repairs and installations
  • Leak detection and pipe repairs

From older homes in Princeton with steam radiators to multi-family properties in Trenton and Hamilton, we understand the plumbing and heating realities common in Mercer County properties.

One Team for Plumbing & Boiler Heat

Many homeowners don’t want to coordinate separate companies for plumbing and heating. Boilers, radiators, and baseboard systems are hydronic systems—and we are licensed to service them properly.


From a leaking pipe to uneven radiator heat, one call covers it. We diagnose first, recommend only what’s necessary, and complete clean, code-aware repairs.

Clear Pricing & Professional Screening

We offer:


  • Free phone consultations
  • Billed on-site diagnostic visits
  • Flat-rate, by-the-job pricing (not hourly guesswork)
  • Financing available for major repairs and replacements


You’ll know the scope and cost before work begins—so there are no surprises.

Why Mercer County Homeowners Choose Rainbow

38+ years of plumbing and heating experience

Licensed, bonded, and insured in NJ

Active involvement in professional plumbing associations

Local, independent company—not a national franchise

Direct communication with experienced professionals

We combine long-term experience with hands-on service, delivering professional results without corporate runaround.

chedule Plumbing or Boiler Service in Mercer County

If you’re searching for a reliable Mercer County plumber for emergencies, repairs, or boiler heat service, Rainbow Plumbing & Heating is ready to help.