Expansion tank, relief valve and air bleeder replaced
Last updated Reviewed by Waseem Shahzad, Lead Technician
Woodbury, NYBoiler RepairTechnician: WaseemOctober 2025
During a fall maintenance visit, the technician found a worn expansion tank, relief valve and air bleeder. All three were replaced on a return visit.
What the homeowner reported
The homeowner has a maintenance agreement, and the technician was there for the fall heating maintenance visit.
What we found
During that visit Waseem found that the expansion tank, the safety relief valve and an air bleeder valve on the gas heating and hot water setup needed replacing. The record shows the old air bleeder was corroded.
What we did
Waseem came back and replaced the expansion tank, the safety relief valve and the air bleeder.
Visits and time on site
Two visits: the fall maintenance visit where the parts were found, and a return visit to replace them.
The result
The three parts were replaced and the system was back in service.
Job details are from our October 2025 service record for this Woodbury home. Customer details are left out.
General information, not details from this job
About expansion tanks, relief valves and air bleeders
These three small parts protect a hot-water system. The expansion tank absorbs the extra volume of water as it heats; when it fails, pressure spikes. The relief valve is the last line of defense, opening if pressure or temperature goes too high, and it should never be capped. The air bleeder lets trapped air escape so water can circulate; a corroded one can leak or stick. Checking all three during yearly maintenance is far cheaper than dealing with a leak or a dripping relief valve in the middle of winter.
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