I claim the ornamental design for a hydronic heating manifold, as shown and described.
FIG. 1 is a top left perspective view of a hydronic heating manifold showing my new design;
FIG. 2 is a bottom left perspective view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a front elevation view thereof, the rear elevation view being identical to the front elevation view; and,
FIG. 6 is a left side elevation view thereof, the right side elevation view being identical to the left side elevation view. In FIG. 6, the broken lines illustrate interior portions of the article and form no part of the claimed design.
In the figures, the article has been broken with wavy lines to indicate indefinite length.
The ornamental design for a hydronic heating distribution manifold having push-fit connections.