DISCONTINUED 1st-line Rubber Blind Filter Insert – 57-58mm

RUBBER Blind Filter Insert C344 – fits most 57mm and 58mm portafilter baskets by inserting into the 2 cup basket. This blind filter basket is used for backwashing or backflushing a grouphead. And, it can be used when descaling so descaling solution is backflushed intot he three way solenoid valve as well as descaling the OPV (over pressure valve) on machines that have this.