Abstract: A manifold for fluids, in particular for heating installations, with the manifold having several mutually couplable housings (1), in particular for receiving valves, flowmeters or thermal sensors, with the housings (1) having a main conduit (2) which is continuous in the axial direction and at least one transversal conduit (16) which is connected with the same, and with a neck (3) which extends in the axial direction of the main conduit (2) and can be inserted into an enlargement (4) of the main conduit (2) of the adjacent housing (1) and a jacket surface (6) of said neck (3) is provided with at least one receiver for a sealing ring.