PEL 22S GAS VALVE. Manufacturer: PEL 22SO. 791911 PEL. 791944 PEL. Outlet Flange type: Horizontal. Gas outlet: M20x1,5 (for tube ø 12/10mm). Gas input: M20x1,5 (for tube ø 12mm). This valve is used by many different manufacturers and can be found installed on various appliances.