Filter for the treatment of a fluid in a heating and/or cooling system

A filter for treating a fluid in a heating and/or cooling system, said filter comprising:

• a first body, hollow, and a second body, wherein said first body and second body are mutually and sealingly connected so as to internally comprise a chamber, and wherein said hollow first body is provided with a first mouth and a second mouth respectively comprising a first duct and a second duct allowing the fluid to enter and/or exit the chamber;
• a port adapted to put the chamber in communication with an environment outside the filter, said port being associated with an upper portion of the first body;
• a filtering element for treating the fluid and housed at least partially in said chamber;
• a shut-off element comprising a slot in communication with the port and an outer wall provided with a channel and an opening, said shut-off element being housed in the first body in a manner such that said shut-off element is rotatable about a longitudinal axis in said first body so as to enable said shut-off element to alternately switch:
• from a first position, in which said shut-off element is positioned in such a way as to allow a flow of fluid to enter the chamber via a communication of the first duct with the channel and to exit the chamber via a communication of the opening with the second duct;
• to a second position, in which said shut-off element is positioned in such a way that said outer wall thereof obstructs the first duct and prevents the flow of fluid from entering the chamber;
• a pin formed on a top wall of the shut-off element, said pin passing through a hole formed on an upper portion of the first body;
• and
• a knob coupled to the pin in order to facilitate the rotation of said pin and of the shut-off element, the knob having a slit adapted to allow said port to pass through and to allow said port to communicate with the chamber.