The ornamental design for a cap for dosingfluid from a tank, as shown and described.
FIG. 1 is a top, front, right perspective view of a cap for dosing fluid from a tank showing my new design;
FIG. 2 is a top plan view of the cap for dosing fluid from a tank of FIG. 1;
FIG. 3 is a bottom plan view of the cap for dosing fluid from a tank of FIG. 1;
FIG. 4 is a top, front, left perspective view of the cap for dosing fluid from a tank of FIG. 1;
FIG. 5 is a top, rear, left perspective view of the cap for dosing fluid from a tank of FIG. 1;
FIG. 6 is a bottom rear perspective view of the cap for dosing fluid from a tank of FIG. 1; and,
FIG. 7 is a left side elevation view of the cap for dosing fluid from a tank of FIG. 1.
The broken lines showing portions of the design in all figures are included for the purpose of illustrating environment and unclaimed features and form no part of the claimed design.