Instructions with the products would be helpful but I figured out how to take apart the old ones in my current spa. The best way to assemble the aerator is to first install the aerator control,then add the tubing to the manifold, check to see if old clamps would hold, if not put new hose clamps on the tubing nipples. then glue on to the aerator control piece this way you have room to attach hoses and clamps.

Did a fine job of replacing a broken one!