Hot Water NJ is the trusted name for water heater service across Harmony and the surrounding area. From a leaking tank to a brand-new tankless system, we handle it all—fast, clean, and code-compliant.
A licensed tech calls you back—usually within the hour.
A water heater expert will reach out within the hour. Need help now? Call 973-834-8833.
Complete water heater care for every home and business in Harmony and across Warren County.
Professional, code-compliant water heater installation for tank and tankless systems, sized and installed right the first time.
Installation in Harmony →Fast, clean replacement of failing or leaking water heaters, often same-day, with old-unit haul-away included.
Replacement in Harmony →Expert diagnosis and repair for no hot water, leaks, noises, pilot light issues, and every common failure.
Repair in Harmony →24/7 emergency response for leaking tanks, no hot water, and failures that can't wait until morning.
Emergency Repair in Harmony →Real feedback from homeowners and businesses we've helped across Northern New Jersey.
"Quick tankless install, walked us through maintenance, and answered every question. Five stars."
— Nick V., Harmony
"Replaced our old 50-gallon with a tankless. Explained everything, pulled the permit, no mess. Highly recommend."
— David R., Harmony
"Best plumbing experience I've had. On time, tidy, and they hauled the old unit away."
— Greg P., Harmony
Yes. We keep technicians local to Warren County and stock common units and parts on our trucks, so most Harmony jobs are completed the same day.
We install and repair every major brand including Rheem, Bradford White, AO Smith, Navien, Rinnai, Noritz, and more—tank, tankless, gas, electric, and hybrid.
Always. We're a licensed NJ plumbing contractor and pull the required permits for every Harmony installation, with inspection-ready, code-compliant work.
Same-day service available across Northern New Jersey. Licensed, insured, and trusted since 2009.