An adapter cap for a fire hydrant, a fire hydrant and a method for remote monitoring an open-close status of a fire hydrant

An adapter cap kit for a fire hydrant comprising a hydrant actuation nut by way of which said hydrant is opened and closed by rotating said hydrant actuation nut, said adapter cap kit comprising:

• at least one reference part comprising a fixator for fixating said reference part to a hydrant housing of said hydrant, and
• an adapter cap including,
• a cap housing comprising a connector for connecting said adapter cap to said hydrant actuation nut, said cap housing comprising a cap actuation nut by which said adapter cap may be engaged and said cap housing comprising a skirt part arranged to encircle at least a part of said connector, wherein a connector centre axis of said connector and a cap actuation nut centre axis of said cap actuation nut are arranged coaxially, wherein said connector and said cap actuation nut are made from a metal, and wherein at least a part of said skirt part is made from a polymer material,
• at least one open-close sensor arranged in said cap housing for detecting said reference part, and
• a wireless communicator arranged in said cap housing for communicating data from said at least one open-close sensor wirelessly to an external data system.

A fire hydrant comprising:

• a hydrant actuation nut by way of which said hydrant is opened and closed by rotating said hydrant actuation nut around a hydrant actuation nut centre axis, and an adapter cap kit comprising:
• at least one reference part connected to said hydrant, and
• an adapter cap including,
• a cap housing being connected to said hydrant actuation nut by a connector,
• at least one open-close sensor arranged in said cap housing for detecting said reference part, and
• a wireless communicator arranged in said cap housing for communicating data from said at least one open-close sensor wirelessly to an external data system.

A method for remote monitoring of an open-close status of a fire hydrant, said method comprising the steps of:

• connecting an adapter cap to a hydrant actuation nut of said hydrant, wherein said adapter cap comprises at least one open-close sensor,
• connecting at least one reference part to a hydrant housing of said hydrant,
• detecting the open-close status of said fire hydrant by detecting rotation of said at least one open-close sensor in relation to said at least one reference part, and
• communicating said open-close status wirelessly to an external data system.