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Thank you Mark.

I've been looking for an identical seal for the Silentrap AAV in Hong Kong of no avail.
Local plumbers said seals from different manufactors won't work with Silentrap. Is that...

Hi fellows,

I live in HongKong in one of those 32 stories apartment buildings.

Have "Silentrap" P-trap with Air Admittance valve install under the kitchen sink.
Lately sewage water leaks from...