So i was testing my 2262 before i set it up on my tank and i put the lid in my sink. Under the lid as i was draining the water i found this little thing. Not sure what it is, i didnt see it while assembling the filter. Does anyone know what it is? I want to make sure before i set it up on my tank to avoid any disasters. I thought it came out of the 2262 pump but i'm not sure. Its like 1/2 inch in diameter. Its grey so i think it goes somewhere as part of the assembly is grey. It has the number 1 on it. It looks like a small circular screw.
Please help!
P.S. Sorry about the bad pictures!



Please help!
P.S. Sorry about the bad pictures!


