Any ideas regarding this part ??

[MancAnt]

Hi all, Does anyone know what this part/valve is ? I know the isolator valve is at the bottom but dont know what the top one is... its making a rumbling noise on the fot feed from this part itself when hot water ran?

 

[snowhead]

Strainer,
They will be a mesh behind the slotted brass screw.
The brass items are non return / check valves

 

[MancAnt]

Thanks for the response, are they easy to replace......the rumbling sounds comes from them once the hot kitchen mixer tap is turned off/on or do you isolate the water with the isolator valve below it and then remove the slotted brass screw to clean it out/fix?

 

[snowhead]

Isolate below first