Abstract: A block body (11) has a fitting (12) with a fluid pipe for connection to a heat exchanger battery, two three or more branches (13) for connection to the pipes of the heat exchanger battery and an intermediate distribution chamber (14) to connect the fitting (12) with the branches (13). This intermediate chamber (14) is circular, completely closed all round and is coaxial with the union part or fitting (12).
Abstract: A block body (11) has a fitting (12) with a fluid pipe for connection to a heat exchanger battery, two three or more branches (13) for connection to the pipes of the heat exchanger battery and an intermediate distribution chamber (14) to connect the fitting (12) with the branches (13). This intermediate chamber (14) is circular, completely closed all round and is coaxial with the union part or fitting (12).