Espresso Machine 1/4" Boiler Safety Valve accessories/knockboxes compatible with both rubber-seat and

compatible with both rubber-seat and ceramic-seat valve versions

Filter size: Standard AeroPress micro-filters

Can be used with Yama CNT5

Double-check your boiler length (380mm vs

CMA 3/8 x 3/8" Check Valve

Espresso Machine 1/4" Boiler Safety Valve accessories/knockboxes compatible with both rubber-seat and1 4" Espresso Machine Boiler Safety Valve 2. 1 Bar A pressure relief safety valve sized for home and small volume single boiler espresso machines, calibrated to release at 2. 1 bar (30. 45 psi). SPECIFICATIONS Calibration pressure: 2. 1 bar (30. 45 psi) Connection: 1 4" COMPATIBILITY Fits: home and small volume boiler espresso machines with a 1 4" safety valve port Replaces: Nuova Simonelli #98013021 (current), which superseded the earlier 1. 8 bar