Hot Water Boiler Replacement in Union County, NJ — Same-Day in Most Cases

Old boiler near the end, leaking heat exchanger, or already failed mid-winter? We replace hot water boilers across Union County — standard efficiency, mid-efficiency, or high-efficiency condensing. Save $300 right now.

A hot water boiler replacement isn't a small job — but it doesn't have to be a multi-week ordeal either. Continental Plumbers has been replacing hydronic boilers across Union County since 1985. We size based on your home's actual heat load (not the biggest unit we can sell), install code-compliant, pull permits, handle the inspection, and most replacements we complete in 1–2 days. Save $300 on current boiler replacements — and qualifying high-efficiency models get NJ Clean Energy Program rebates on top.

NJ Master Plumber License #9142
Since 1985
4.7★
(1,377 reviews)
Save $300
Financing available
Signs It's Time to Replace

Six Signs Your Hot Water Boiler Is Past Repair

Some boiler issues are still a repair. These usually aren’t:
Your Boiler Is Over 20–25 Years Old

Hot water boilers typically last 15–25 years. Past that, you're on borrowed time. Efficiency drops, parts get harder to find.

The Heat Exchanger Is Leaking

Water leaking from inside the boiler itself (not a fitting or valve) is heat exchanger failure. Almost never economically repairable.

Repeated Repairs Aren't Holding

Two or three repair calls in a year is the system telling you something. The next failure will probably be the last.

Your Heating Bills Keep Climbing

Old boilers lose efficiency every year — corrosion, sediment, deteriorating components. A high-efficiency replacement can cut heating bills 20–40%.

Cold Spots You Can't Fix

After repair, bleeding, and balancing — if some areas still won't heat properly, the boiler itself may not be producing or circulating enough heat.

Visible Rust or Corrosion on the Boiler Body

External rust often signals internal corrosion. Once the pressure vessel is compromised, repair isn't an option.

Not sure if it's repair or replace? Read about Hot Water Boiler Repair → or call (973) 900-0430 — we'll diagnose and tell you straight.

Choosing the Right Replacement

Standard, Mid-Efficiency, or High-Efficiency Condensing — What's Right for Your Home?

Three tiers, three price points, three different long-term cost equations:
Standard Efficiency (80–83% AFUE)

Best for: Tight budgets, simple replacements, homes you don't plan to stay in long-term. Lower upfront cost, proven technology, easy to service.

Mid-Efficiency (84–89% AFUE)

Best for: Most Union County homes. Solid middle ground — better efficiency than standard without the higher install complexity of condensing units.

High-Efficiency Condensing (90–98% AFUE)

Best for: Homes you'll stay in long-term, larger heating loads, anyone maximizing NJ Clean Energy rebates. Highest upfront cost but biggest long-term savings. Requires venting upgrade (often through sidewall) and condensate drain.

We size based on your home's actual heat load — square footage, insulation, window count, climate zone. Not based on what's easiest to install or biggest commission.

We Get It

The Concerns We Hear About Steam Boilers

"I just bought this house and the steam heat is a mystery to me."

Very common in older Union County homes. Steam heating was the standard from the 1900s through the 1950s — and most original systems are still running. We'll walk you through what you have, what's normal vs. what's a problem, and what maintenance the boiler needs. No talking down to you, no jargon.

"My boiler is 60 years old. Should I be replacing it?"

Maybe — maybe not. Old cast-iron steam boilers are workhorses. We've seen 70- and 80-year-old units still running well with proper maintenance. We assess: pressure vessel condition, efficiency, parts availability, and your fuel costs. If repair makes sense, we repair. If replacement is genuinely the better call, we tell you straight.

"My radiators bang every time the heat comes on — is that normal?"

No. It's a common myth that "steam pipes just bang." Banging is condensate (water) getting smashed by steam — and it's always fixable. Usually pitch, venting, or a failing steam trap. We hear it, find the cause, and fix it. Your house can be quiet.

"I had a plumber out and he said he doesn't really work on steam systems."

Hear this constantly. Steam expertise has been disappearing from the trade — newer plumbers are trained on hot water and forced-air systems. We're one of the few in Union County that still services steam comprehensively. If you've been told "we don't do steam" or "you should just replace it," call us before you spend the money.

Steam Boiler Emergencies

24/7 Winter Emergency Line: (973) 900-0430

These can’t wait — call immediately:

Smell gas? Leave the house and call (973) 900-0430 from outside. Don't turn anything on or off. If the smell is strong, also call your gas company or 911.

The Neighbor Difference

Why Union County Trusts Continental with Steam Boilers

Local since 1985

40+ years working on steam systems in Union County. Elizabeth, Hillside, Roselle, Union — we know these old homes.

Steam expertise that's getting rare

Many newer plumbers don't work on steam. We do — and we know the diagnostics that take experience to learn.

Repair-first philosophy

Old steam boilers often have decades of life left. We don't push replacement unless it's actually time.

Licensed & warrantied

NJ Master Plumber #9142. 24/7 winter emergency. Warrantied work.

Where We Serve

Steam Boiler Repair Across Union County

Don’t see your town? call (973) 900-0430

Steam Boiler FAQs

Look at the gauge on the boiler. If it reads in PSI and tops out around 5–10 PSI, it's steam. Hot water boilers read in PSI but operate at 12–30 PSI, often with a temperature gauge too. Steam boilers usually have a sight glass (a small vertical glass tube) showing water level — hot water boilers don't.
Banging is condensate (water) being smashed by steam — never normal. Causes: improper pitch on radiators or pipes, failing steam traps (in two-pipe systems), blocked main vent, or too much water in the system. All fixable.
With proper maintenance: 40–60 years for the boiler itself, often longer. The cast-iron pressure vessel is incredibly durable. Burners, valves, and controls need periodic replacement, but the boiler heart often outlasts modern systems by decades.
Sometimes worth it, sometimes not. Steam systems work well when properly maintained. Switching to hot water involves replacing all the radiators (or converting them), new piping, and a new boiler. Major expense. We'll honestly walk you through whether it makes sense for your home.
For larger repairs and full replacements, yes — through Wisetack. Approved in minutes, no credit impact.
Yes. We work on multi-family steam systems across older Union County — apartment buildings in Elizabeth, Hillside, and similar areas. Maintenance contracts available.