Membrane for Domestic Waterworks makes a good impression, but unfortunately does not match the pressure vessel: The vessel size there are apparently two different flange. Here no measure was indicated. So I promptly got the wrong size. But I have only noticed after I had tried desperately to get the Membranansschluß tight. After that, I liked the scratched item no longer return ... More information would have been helpful here and have saved me from a bad buy.
