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Baseboards are noisy (air in the system)
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- Check glycol concentration with a refractometer. Low glycol levels can cause cavitation and noise. Top up if needed.
- Inspect the circulator pump and filters. Remove any debris that may be causing restriction and noise.
- Make sure automatic air vents at the baseboards are operating properly to bleed trapped air.
- Feel for vibrations along the supply and return pipes. Support or isolate vibrating pipes as needed.
- Check baseboard piping is properly pitched to avoid air pockets. Pitch 1/4 inch per foot of pipe run.
- Flush the hydronic system to remove sediment that could be causing noise at the baseboards.
- Listen for hissing sounds indicating steam in the system. Repair leaks and purge air to quiet steam noise.
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