Connection device having - at least one basic component which has a plurality of fluid passage points (P' 1 , P' 2 , P' 3 , P' n..... P' x ) adjacent to each other, - a basic body which is used to control a fluid flow via a functional component in the form of a valve device, wherein the basic body has a plurality of further fluid passage points (P 1 , P 2 , P 3 , P n..... P x ) which are connected to the associated fluid passage points (P' 1 , P' 2 , P' 3 , P' n..... P' x ) in the basic component and to each other in a fluid-conducting manner, wherein the basic body (12 has at least one blocking part which can shut off the respective fluid passage point in the basic component and/or in the basic body , said fluid passage point remaining unaffected by the functional component , wherein within the basic body , between the further fluid passage points (P 1 , P 2 , P 3 , P n..... P x ) and the functional component , there is in each case a fluid-conducting connecting line which can be shut off by a separate blocking part , provided that this connection to the functional component remains unused, wherein the respective connecting lines consist of a central line , into which the functional component is connected, and individual line sections which establish a connection between this central line and the respective associated further fluid passage point (P 1 , P 2 , P 3 , P n..... P x ), wherein only one fluid-conducting line section leads via the central line to the input side of the functional component and in turn only one fluid-conducting line section is connected via the central line on the output side of the functional component , and wherein, on the output side of the functional component , the functional component is connected into the central line upstream of the last line section leading out of the basic body . - at least one basic component which has a plurality of fluid passage points (P' 1 , P' 2 , P' 3 , P' n..... P' x ) adjacent to each other, - a basic body which is used to control a fluid flow via a functional component in the form of a valve device, wherein the basic body has a plurality of further fluid passage points (P 1 , P 2 , P 3 , P n..... P x ) which are connected to the associated fluid passage points (P' 1 , P' 2 , P' 3 , P' n..... P' x ) in the basic component and to each other in a fluid-conducting manner, wherein the basic body (12 has at least one blocking part which can shut off the respective fluid passage point in the basic component and/or in the basic body , said fluid passage point remaining unaffected by the functional component , wherein within the basic body , between the further fluid passage points (P 1 , P 2 , P 3 , P n..... P x ) and the functional component , there is in each case a fluid-conducting connecting line which can be shut off by a separate blocking part , provided that this connection to the functional component remains unused, wherein the respective connecting lines consist of a central line , into which the functional component is connected, and individual line sections which establish a connection between this central line and the respective associated further fluid passage point (P 1 , P 2 , P 3 , P n..... P x ), wherein only one fluid-conducting line section leads via the central line to the input side of the functional component and in turn only one fluid-conducting line section is connected via the central line on the output side of the functional component , and wherein, on the output side of the functional component , the functional component is connected into the central line upstream of the last line section leading out of the basic body . <EOS>