More on my macerator adventure. I had to remove my ball valve to get it to move after lubing. When I was installing it the thru hull started to spin. I am a worrier so that meant I had to remove it to inspect. Bits of hard white stuff fell out as it was being removed. I tried to remove my engine raw water thru hull to compare but it was attached like it was meant to with no intention of being removed. Why would one fail but not the other three? I am planning to replace with bronze and 5200, sound ok? 93 tall rig