1/4 " M Anti Vacuum / Siphon Valve For Espresso Machines. Fits all Espresso machine Makes and Models that accept a 1/4" M Anti Vacuum / Siphon Valve. These Valves are Typically Found either on the Boiler or on the sight Glass of most Espresso Machines. It is very important that this Part is working 100% on your machine any steam or pressure loss through this valve will affect the function of your machine causing it to lose pressure therefore affecting your steam pressure and boiler temperature. Also by replacing your Damaged Vacuum / Siphon Valve you save on your energy bill as the machine is not turning on as many times to heat up the boiler therefore holding and maintaining a more steady and even pressure for a longer period of time. If your Valve is stuck in the closed Position due to scale build up, this can cause milk to be sucked back into your boiler if not working correctly. Suitable for the following Equipment: ATEL AZKOYEN BEZZERA BFC BIANCHI BRASILIA BRUGNETTI-AURORA CARIMALI CONTI ECM ECM MANUFACTURE ELEKTRA EXPOBAR FAEMA FIORENZATO C.S. FUTURA FUTURMAT-ARIETE GEM-FUTUREMA GEV GRIMAC GRIMAC GRUPPO IZZO LA PICCOLA LAVAZZA MARCFI-ANCAS NUOVA SIMONELLI PAVONI RANCILIO ROYAL SAB ITALIA SAN MARCO SAN MARCO SANREMO 1SCALA SPAZIALE SYNESSO UNIC VFA EXPRES MEVIBIEMME VICTORIA ARDUINO WEGA