Forum Discussion
John_Joey
Oct 19, 2014Explorer
lanerd wrote:
But your tanks are a closed system with a roof vent. Something is wrong. I suggest you check the AAV (air admittance valve) usually located under the kitchen or bath (or maybe both) sinks. They are cheap and can be found at any hardware store...
X2, this is more then likely your real problem. They go bad and are cheap and easy to replace.
Kirk's nice clicky on the subject.
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