worries for installation. As another user, large water leak at the opening of the water supply. After mounting, disassembled, tightened more, less ... I tried to add a second seal (adjustment side of the T °) and there, great. Since then, no leakage, no noise as with some fine tuning of the T °, 2 levels of water pressure settings ... The mixer appears quality, too bad the additional seal is not provided for the few people who need it ...