a joint between first and second fluid conveying structures such that a fluid being conveyed through one of the fluid conveying structures flows into the other fluid conveying structure, the fluid conveying structures being fixed from movement relative to one another at the joint; and

a spray obstructing structure lying in the path of any fluid that might spray from the joint in any direction within a range of directions, wherein the spray obstructing structure is permanently attached to one of the fluid conveying structures, and the spray obstructing structure is sufficiently open to enable the fluid conveying structures to be completely removed from one another.