Perma Cast Above Ground Water Bonding Fitting (PB AG) dimensionone This part has practical value This part has practical value because replacing the timer motor can restore the timing function of an existing mechanism without requiring a complete timer replacement It is a practical replacement when the original retainer is rusted Bonding components are useful because they help support the electrical safety design of the pool system and its surrounding environment This part has practical value because the above ground specific design makes it more appropriate than a general fitting in installations built around that layout