To “chop” incoming air into even smaller bubbles, some manufacturers include pinwheel or needle wheel impellers in their skimmer pumps. As bubbles pass through the impeller, “needles” or “pins” shred incoming bubbles into microbubbles. Eventually, these can wear over time requiring replacement.
Replacement impeller for submersible pumps.
Made by Danner for the following pumps: Danner, Pondmaster, and Supreme.
Available for Model 2, 3, 5, 7, 9.5, 1200, 1800, 2400, and 3600 Danner Pumps.