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Question DetailsAsked on 3/25/2014

Who replaces the galvanized pipe in the chimney for a hot water tank? Can a new liner be installed?

This is the exhaust chimney for the hot water tank.

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1 Answer


An HVAC (Heating, Ventilation, Air Conditioning) contractor. Depending on how straight the chimney is, can be a simple $300-400 range job, or can run up into $1000 range if crooked chimney or large combined pipe for several heating appliances.

If your water heater is old, or you are interested in higher efficiency, you may find that installing a condensing heater or tankless heater now will be the way to go, because they do not vent to the roof at all - they use plastic pipe through the nearest outside wall, so you could apply the duct replacement cost (assuming this duct does not also serve your furnace) to a water heater replacement and just cap and abandon the old flue pipe. JCCasper's answer in the following thread discusses this (ignore the rest of those comments - do not apply to you) -

Answered 5 years ago by LCD

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