Combination of a heating device, a connector, and a gas meter, wherein the heating device comprises a gas pipe, a gas nipple, a burner, a heat exchanger for heating a medium flowing through the heat exchanger, and an exhaust gas conduit, the gas meter is arranged to measure a property of a gas, such as the pressure, in the heating device, the connector extends between a device end and a meter end, the connector comprises an elongated member, and meter connecting means for connecting the connector to the gas meter at the meter end, the elongated member is made of a flexible material and is provided with a through channel, the through channel is arranged as a nipple connector at the device end of the connector and provides a fluid connection for guiding gas from the nipple connector to the meter connecting means, and an inner diameter of the nipple connector is smaller than an outer diameter of the gas nipple, and the flexibility of the flexible material is such that the nipple connector is releasably connectable over the gas nipple, wherein the connector further comprises a rigid member, wherein the rigid member is made of a material which is more rigid than the flexible material of the elongated member and supports the elongated member, the rigid member extends in a longitudinal direction of the elongated member over a length which at least corresponds to the length of the nipple connector in the longitudinal direction of the elongated member, and in a circumferential direction of the elongated member over less than half of the circumference of the elongated member, and the rigid member and the elongated member are interconnected at least at the nipple connector. the heating device comprises a gas pipe, a gas nipple, a burner, a heat exchanger for heating a medium flowing through the heat exchanger, and an exhaust gas conduit, the gas meter is arranged to measure a property of a gas, such as the pressure, in the heating device, the connector extends between a device end and a meter end, the connector comprises an elongated member, and meter connecting means for connecting the connector to the gas meter at the meter end, the elongated member is made of a flexible material and is provided with a through channel, the through channel is arranged as a nipple connector at the device end of the connector and provides a fluid connection for guiding gas from the nipple connector to the meter connecting means, and an inner diameter of the nipple connector is smaller than an outer diameter of the gas nipple, and the flexibility of the flexible material is such that the nipple connector is releasably connectable over the gas nipple, wherein the connector further comprises a rigid member, wherein the rigid member is made of a material which is more rigid than the flexible material of the elongated member and supports the elongated member, the rigid member extends in a longitudinal direction of the elongated member over a length which at least corresponds to the length of the nipple connector in the longitudinal direction of the elongated member, and in a circumferential direction of the elongated member over less than half of the circumference of the elongated member, and the rigid member and the elongated member are interconnected at least at the nipple connector.