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    henry5120's Avatar
    henry5120 Posts: 1, Reputation: 1
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    #1

    Nov 22, 2010, 01:38 PM
    I had a 95% eff Trane furnace installed , now when the heat is on the outside
    I had a 95% eff Trane furnace installed , now when the heat is on the outside pcv vents are spitting water and making a loud perculating noise . Is this normal?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Nov 22, 2010, 02:11 PM
    Yes
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #3

    Nov 22, 2010, 03:24 PM
    Yes, some spitting and percolating is acceptable. However, if the plastic vent pipe isn't supported properly, it can get a bow in it, water can build up and actually block the vent. The heater will not work properly since the purge vent shows a back pressure build up and shuts down the heater.
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