BoilerTroubleshooting2026-02-26
Radiator Leaking: What to Do
Radiator leaks come from valves, joints or corrosion and should be fixed promptly.
A leaking radiator drops system pressure and damages floors — here's how to handle it.
Common causes
Leaks typically come from the valve gland, pipe joints, or pinhole corrosion in an older radiator.
What to do
Catch the water and reduce pressure; a technician tightens or replaces the valve or fitting, or replaces a corroded radiator.
Key takeaways
- Often a valve or joint leak
- Corrosion can pinhole old radiators
- Contain water and lower pressure
- Repair or replace promptly
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