Stackable sprinkler

FIG. 1 is a right, front perspective view of a stackable sprinkler;

FIG. 2 is a bottom right, front perspective view thereof;

FIG. 3 is a right-side, elevational view thereof;

FIG. 4 is a top, plan view thereof;

FIG. 5 is a bottom, plan view thereof;

FIG. 6 is a rear, elevational view thereof;

FIG. 7 is a front, elevational view thereof;

FIG. 8 is a cross-sectional view taken along line 8 — 8 in FIG. 3 ; and,

FIG. 9 is a cross-sectional view taken along line 9 — 9 in FIG. 3 .

The broken lines in the drawings illustrate environmental structure and form no part of the claimed design.