Boiler Leaking Water

When this becomes an emergency

• Rust-colored water has stained the concrete under the unit.
• A fitting has started dripping onto the burner housing below it.
• The pressure reading swings widely between a cold system and a hot one.
• The basement smells of damp iron even when nothing looks wet.

What a pro does

Salt air and damp basements are hard on iron, so the first task is telling active leakage apart from years of surface corrosion that only looks alarming. The technician traces the wet path back to its highest point, since water runs along pipe and jacket before it drops, and the visible drip is rarely above the failure. Common origins are the relief valve, the circulator flange gaskets, threaded joints that have worked loose through decades of heating and cooling, and the coil gasket on units producing domestic hot water. Pressure behavior gets read at the same time, because a system that climbs when hot and won't come back down has an expansion tank problem underneath the leak. Cutting power and closing the feed is the sensible holding move.

Frequently asked questions

Boiler Leaking Water?

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