A valve system for a water pipe, comprising: a closure head capable of being attached to a water container of a water pipe, said closure head including: a bottom side facing the water container when the closure head is attached, and a top side opposing the bottom side, and a first recess, and a smoke hose connection being adapted to establish a fluid-conducting connection between the water container and the surroundings of the water pipe by means of the first recess, and a second recess having a blow-out valve being adapted to close a fluid-conducting connection between the second recess and the water container when there is a negative pressure in the water container, and to open a fluid-conducting connection between the water container and the recess when there is excess pressure in the water container, a lower smoke pipe attached to the bottom side of the closure head, and an upper smoke pipe attached to the top side of the closure head, and a valve housing attached to the top side of the closure head and surrounding the upper smoke pipe, having an outer surface facing away from the upper smoke pipe, and a cladding tube attached to the valve housing and surrounding the upper smoke pipe, and a valve body arranged on the valve housing and surrounding the valve housing, having an inner surface directed towards the outer surface of the valve housing and a third recess, wherein the valve housing and the cladding tube form an annular space between the upper smoke tube and the valve housing and the cladding tube, said annular space being connected to the second recess in a fluid-conducting manner, and wherein the third recess is adapted to establish a fluid-conducting connection between the annular space and the surroundings of the water pipe, and wherein the valve body is designed such that it is capable of being moved along an outer surface of the valve housing even during operation of the water pipe in such a way for it to be able to assume at least one closed position and at least one open position, said valve body, when in the closed position, closing the third recess towards the surroundings of the water pipe and, when in the open position, opening the third recess towards the surroundings of the water pipe in such a way that, in the event of excess pressure in the water container, a fluid-conducting connection may be formed between the water container and the surroundings of the water pipe, via the second recess and the annular space and the third recess. a closure head capable of being attached to a water container of a water pipe, said closure head including: a bottom side facing the water container when the closure head is attached, and a top side opposing the bottom side, and a first recess, and a smoke hose connection being adapted to establish a fluid-conducting connection between the water container and the surroundings of the water pipe by means of the first recess, and a second recess having a blow-out valve being adapted to close a fluid-conducting connection between the second recess and the water container when there is a negative pressure in the water container, and to open a fluid-conducting connection between the water container and the recess when there is excess pressure in the water container, a bottom side facing the water container when the closure head is attached, and a top side opposing the bottom side, and a first recess, and a smoke hose connection being adapted to establish a fluid-conducting connection between the water container and the surroundings of the water pipe by means of the first recess, and a second recess having a blow-out valve being adapted to close a fluid-conducting connection between the second recess and the water container when there is a negative pressure in the water container, and to open a fluid-conducting connection between the water container and the recess when there is excess pressure in the water container, a lower smoke pipe attached to the bottom side of the closure head, and an upper smoke pipe attached to the top side of the closure head, and a valve housing attached to the top side of the closure head and surrounding the upper smoke pipe, having an outer surface facing away from the upper smoke pipe, and a cladding tube attached to the valve housing and surrounding the upper smoke pipe, and a valve body arranged on the valve housing and surrounding the valve housing, having an inner surface directed towards the outer surface of the valve housing and a third recess, wherein the valve housing and the cladding tube form an annular space between the upper smoke tube and the valve housing and the cladding tube, said annular space being connected to the second recess in a fluid-conducting manner, and wherein the third recess is adapted to establish a fluid-conducting connection between the annular space and the surroundings of the water pipe, and wherein the valve body is designed such that it is capable of being moved along an outer surface of the valve housing even during operation of the water pipe in such a way for it to be able to assume at least one closed position and at least one open position, said valve body, when in the closed position, closing the third recess towards the surroundings of the water pipe and, when in the open position, opening the third recess towards the surroundings of the water pipe in such a way that, in the event of excess pressure in the water container, a fluid-conducting connection may be formed between the water container and the surroundings of the water pipe, via the second recess and the annular space and the third recess.