FIG. 1 is a front elevational view of a boiler water fountain for a play structure in accordance with the present invention, the broken line showing of the play structure, font facade and entry awning is for illustrative purposes only and does not form part of the claimed design;

FIG. 2 is an enlarged front elevation view thereof;

FIG. 3 is a rear elevation of FIG. 2;

FIG. 4 is a right side elevational view of FIG. 2;

FIG. 5 is a left side elevational view of FIG. 2;

FIG. 6 is a top plan view of FIG. 2;

FIG. 7 is a bottom plan view of FIG. 2; and,

FIG. 8 is a front elevational view of FIG. 2, the broken line showing of the water is for illustrative purposes only and does not form part of the claimed design.