Domestic appliance comprising a knob structure with an extension extending to the valve comprising: • The knob driving the valve it is connected by rotating around its own axis with the rotational force to be exerted by the user, having the shaft gap where the valve shaft on the inner side invisible to the user will be located and fixed, the knob groove where the knob-boss and the spring is located, and the spring support base that is the base of the knob groove on the inner side, right behind the outer surface visible to the user and to which one surface of the spring contacts, • The spring, one surface of which is located to the knob groove and the other to the spring groove on the knob-boss, which creates a repelling force towards the domestic appliance surface by jamming in a position rectangular to the household appliance surface with the mounting of the knob to the valve, and jams the knob-boss and the gasket towards the domestic appliance surface with this repelling force it creates and void-free locates the knob-boss and gasket to the stove surface with this jamming it forms, • The knob-boss which can move freely in the vertical position in relation to the domestic appliance surface within the knob groove, that connects void-free to the household appliance surface with the repelling force exerted by the spring, and has spring groove to which the one surface of the spring is located and gasket gap to which the gasket is located, and • The gasket which is located into the gasket gap on the knob-boss and prevents the possible leaks from the knob-boss, the knob structure comprising the pipe-form on the inner side and right at the centre of the knob and extending directly up to the valve for the knob to directly connect to the valve shaft, further comprising the knob boss bearing the required space through which the pipe-form can pass, further comprising the gasket bearing the required space through which the pipe-form can pass, further comprising the pipe-form that is an extension of the knob and connects the knob directly to the valve passing through the gaps exactly in the centre of the knob-boss and the gasket for centring from one single point. • The knob driving the valve it is connected by rotating around its own axis with the rotational force to be exerted by the user, having the shaft gap where the valve shaft on the inner side invisible to the user will be located and fixed, the knob groove where the knob-boss and the spring is located, and the spring support base that is the base of the knob groove on the inner side, right behind the outer surface visible to the user and to which one surface of the spring contacts, • The spring, one surface of which is located to the knob groove and the other to the spring groove on the knob-boss, which creates a repelling force towards the domestic appliance surface by jamming in a position rectangular to the household appliance surface with the mounting of the knob to the valve, and jams the knob-boss and the gasket towards the domestic appliance surface with this repelling force it creates and void-free locates the knob-boss and gasket to the stove surface with this jamming it forms, • The knob-boss which can move freely in the vertical position in relation to the domestic appliance surface within the knob groove, that connects void-free to the household appliance surface with the repelling force exerted by the spring, and has spring groove to which the one surface of the spring is located and gasket gap to which the gasket is located, and • The gasket which is located into the gasket gap on the knob-boss and prevents the possible leaks from the knob-boss, the knob structure comprising the pipe-form on the inner side and right at the centre of the knob and extending directly up to the valve for the knob to directly connect to the valve shaft, further comprising the knob boss bearing the required space through which the pipe-form can pass, further comprising the gasket bearing the required space through which the pipe-form can pass, further comprising the pipe-form that is an extension of the knob and connects the knob directly to the valve passing through the gaps exactly in the centre of the knob-boss and the gasket for centring from one single point.