The Impeller Catcher is designed to capture broken pieces of impellers BEFORE they enter the heat exchanger. The main body of the impeller catcher has a meshed filter which filters out and captures the rubber particles before they cause blockages to the heath exchanger and beyond. The ‘impeller catcher’ is placed in-line between the raw water pump and heat exchanger and connected using stainless steel jubilee clips, 2 at each end. (The photos below show the unit fitted in-line from a side view and above on an Cummins Onan MDKBL generator). The Impeller Catcher is opened by removing the hexagonal bung and removing the mesh filter. Make sure you turn off the seawater inlet before doing this. For further information please contact us +44 (0) 1473 718713.