Just reamed out my original 3 inch sewer drain and added the valterra spigot third valve. Now with a 90 attached I can close the bay door with slinky attached. <br/><br/>Used the Reem PPR300 3" pipe reamer to clean out the hub. Worked very well. <br/><br/>I'm willing to loan this out if you pay shipping or sell it for a reasonable price. It's a one time use tool and Lord knows I have...