Legislation regarding the 2190 pierceable Gas Cartridge changed last year where the cartridge now contains a system inside, a self sealing valve, where you are now able to remove the cartridge from the appliance without gas escaping, whereas before the gas would escape until depleted. The 2190 Pierceable Gas Cartridge which we supply, with immediate effect, conforms to BS EN417:2012 4.3.1