Connection set for operating the pilot flame with a propane cylinder (for the Mobile Gas Flare M and L). The connection set consists of a pressure reducer with an adjustable outlet pressure of 0.5 to 4 bar (402253), a hose breakage safety device (402259), the hose including ball valve (402255) and the connection adapter with the Series 21 coupling (312214). The hose is essential for operating the Mobile Gas Flare L, while it is optional for the Mobile Gas Flare M (a pilot flame must be present in the burner pot, which can be recognised by the Series 21 connection nipple below).