Replace a broken or damaged part with this Estella Caffe 236PECEM27 O-ring. This water/steam O-ring is a direct replacement for the one that came with your unit, and is a great choice for keeping your machine operating effectively for as long as possible. It is made for use with select Estella Caffe ECTPM, ECMS, and ECEM series, and is part of the water / steam tap assembly.