ECM Bottomless Portafilter

The Bottomless Portafilter is the spoutless filter holder ECM Manufacture sells as an official accessory for its E61 group-head machines, listed under item number AC100106-00. It is chrome-plated and replaces the standard spouted bottom with an open design meant for watching the extraction directly as it flows into the cup.

The manufacturer ships it with a stated 21 gram filter basket, sized for double or triple doses depending on the target machine. Declared compatibility covers all ECM machines with an E61 group head, an architecture that spans much of the manufacturer's semi-professional home range.

The manufacturer does not state the portafilter's diameter on the product page, nor whether the included basket is a precision basket or a standard one: anyone chasing finer control over extraction will need to check this elsewhere or swap the basket separately.