Boiler Leaking Water

Water running out of a boiler in an old farmhouse cellar finds joists and wiring long before it finds a drain, so make the call today.

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When this becomes an emergency

A wet ring has spread across the cellar floor under the boiler jacket.
The gauge needle sits higher than the mark it normally rests at.
Green or white crust has formed on the copper fittings overhead.
The discharge pipe off the relief valve stays wet between firing cycles.

What a pro does

Finding where the water starts matters more than seeing where it lands. Oil-fired units out here often sit on cast iron sections that have carried water through forty winters, so a technician follows the drip upward from the puddle to the jacket seam, the circulator flange, or the domestic coil gasket before forming any opinion. Pressure that climbs on its own points at the expansion tank or a feed valve stuck partly open, not at a failed section. A weeping flange is a repair; a split section isn't. Shutting the burner switch and closing the cold feed keeps things from getting worse in the meantime.

Frequently asked questions

Where does the water usually come from on an older boiler?

Far more often from a valve, pump seal, or gasket than from the boiler body itself, which is why chasing the drip to its origin comes before any talk of replacement.

The gauge keeps climbing on its own. What does that mean?

Something is feeding water in or the expansion tank has lost its air cushion, and the relief valve is then doing its job by letting the excess out.

Can a leak wait until the weather warms up?

Waiting is how a small weep turns into a rusted-through section, and a cellar floor that stays damp all winter is hard on everything sitting near it.

Is there anything to do before someone arrives?

Cutting power at the burner switch and closing the cold water feed stops the system from replacing what it's losing, which limits the mess without forcing anything.

Boiler Leaking Water?

Get connected with a local pro now.

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