We had a telephone conference with Rafael (Geberit) yesterday and in short… first of all we want to thanks you/TCI to observe the loud/noise. Rafael also explained why it may occur and the reason is airpockets inside the mechs. The air disappears after a few flushes. Geberit has taken some measures to prevent it from happen and I find the info from Rafael relevant and I feel comfortable (at the moment I might add) with the info given from Geberit and it shouldn’t be any problem…..to ship WC´s to Svedbergs!
But I ask you kindly to keep an eye on the “problem” and if you find it escalates or worrying - we ask you to address us again.
Last but not least.. The one(s) that has been making noise….. do you have it in your possession and can send it Rafael?