Water port closure assembly

A hydraulic port assembly comprising:

• a housing having an opening therethrough;
• a first port located in and extending through the opening defining a flow channel through the first port from a first end to a second end, the flow channel having an axis (A) defined between the first end and the second end;
• and
• a closure mechanism moveable between an open position in which the flow channel is open and allows fluid flow therethrough and a closed position in which the flow channel is closed and prevents fluid flow therethrough, wherein the closure mechanism comprises:
• a filter unit comprising a first filter part located in the flow channel, and having perforations formed therein to allow fluid flow in the flow channel through the first filter part;
• and
• a second filter part located in the flow channel axially adjacent the first filter element, the second filter element being rotatable about the axis (A) relative to the first filter element, the second filter element having perforations formed therein to allow fluid flow in the flow channel through the second filter part, the second filter part rotatable, relative to the first filter part, about the axis (A) between a first position in which the perforations of the second filter part are aligned with the perforations of the first filter part allowing fluid flow through the filter unit, and a second position in which the perforations of the second filter part are not aligned with the perforations of the first filter part such as to prevent fluid flow through the filter unit,
• the closure mechanism further comprising a spring in contact with the second filter part configured to bias the second filter part axially against the first filter part.