1/4″ Brass Anti-Vacuum Valve

Also called siphon, anti-siphon or vacuum breaker valve. This valve allows air to escape the boiler as the water heats up, hissing and then closing off when the boiler water reaches it’s operating temperature, sealed by the steam pressure created. Measure your existing valve: the outside of the male threads of a 1/4″ BSP fitting measure 1/2″. One may also use this version . Gaskets are not always required; as the valve and boiler expand any small leaks at the junction will likely take care of itself. A good rule of thumb: if your valve and boiler had a gasket, get a new replacement for added assurance. Cross-references : Part number Manufacturer W10836 ASCASO 56150 ASTORIA 5965070 BEZZERA 7452511 BEZZERA 3630001 BFC 418-932-000 CIMBALI C219900561 ECM MANUFACTURE 3161134654 FAEMA 5.0.000.1002 FIAMMA RST 1200300045 GRIMAC GR037 GRIMAC 1066125 LAVAZZA 10066400 LAVAZZA 10082685 LAVAZZA L190 MARZOCCO (theirs have a lower fitting that is zinc-coated) 700750 NUOVA RICAMBI 56150 MCE D56150 ORCHESTRALE C219900561 PROFITEC 3630001 ROYAL 528124 VFA EXPRES WY56150 WEGA