Boiler Leaking Water?
Water leaks from your boiler need immediate attention. Here's what might be causing it and what to do.
Emergency Steps
- 1Turn off the boiler at the power switch
- 2Shut off the water supply to the boiler if safe to do so
- 3Place containers under leaks to catch water
- 4Do not attempt to repair pressurized systems yourself
- 5Call for professional service immediately
Common Causes of Boiler Leaks
Pressure Relief Valve Discharge
Valve releasing excess pressure—normal safety function but may indicate problem.
Corroded Pipes or Fittings
Age-related corrosion causing pinhole leaks.
Faulty Pump Seal
Circulator pump seal has failed.
Heat Exchanger Leak
Internal corrosion or cracking in heat exchanger.
Loose Connections
Pipe connections have loosened over time.
Basement Flooding Concerns in Nassau County
Many Nassau County homes, especially in low-lying areas like Island Park, Long Beach, and Oceanside, have boilers in basements prone to moisture issues. A leaking boiler can quickly lead to significant water damage. We recommend installing a water alarm near your boiler and knowing your water shutoff location.
When to Call a Professional
- Any visible water leak from boiler
- Water pooling under or around boiler
- Pressure gauge dropping despite adding water
- Leak combined with loss of heat
Frequently Asked Questions
Is a leaking boiler an emergency?
Yes, any active leak should be addressed immediately. Water damage can occur quickly, and a leaking heat exchanger may also pose CO risks. Turn off the boiler and call for same-day service.
Can a leaking boiler be repaired or does it need replacing?
It depends on the leak source. Valve, pump, and connection leaks are usually repairable ($150-$600). Heat exchanger leaks in older boilers often make replacement more cost-effective.
Why does my boiler only leak when it's running?
Leaks that appear only when the boiler runs typically indicate a failed pump seal or pressure-related issue. The heat and pressure during operation cause expansion that reveals the leak.
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