Leaking boiler: expansion tank and air bleeder replaced, plus a tune-up

Last updated October 27, 2026Reviewed by Waseem Shahzad, Lead Technician

Dix Hills, NYBoiler RepairTechnicians: Waseem and UmarMarch 2026

A leaking boiler. We replaced the expansion tank and the air bleeder, bled the air from the system and did the yearly boiler maintenance.

Gas boiler and near-boiler piping, Dix Hills NY

New automatic air bleeder on the heating piping, Dix Hills NY

Boiler burners during the tune-up, Dix Hills NY

Water drained from the system during the repair, Dix Hills NY

What the homeowner reported

The homeowner reported that the heating boiler was leaking and also wanted the yearly maintenance done.

What we found

The leaks traced to the expansion tank and an air bleeder on the heating system.

What we did

Waseem and Umar replaced the expansion tank and the air bleeder, bled the air from the system and then completed the boiler maintenance, including the burners.

The result

The leak repairs and the boiler maintenance were completed on the same visit.

Job details are from our March 2026 service record for this Dix Hills home. Customer details are left out.

General information, not details from this job

About boiler expansion tanks

A hot-water boiler needs room for the water to expand as it heats. The expansion tank holds that extra volume against a cushion of air. When the tank fails, pressure rises with every heating cycle and the relief valve or a weak fitting starts to drip. An air bleeder that leaks shows up the same way, as water around the boiler, so both are checked on a leak call.