It was developed with Supply set, should have been developed set with Extract. Thats why this is happening. If you have Autodesks ear on this, tell them thats the issue and it needs to be redeveloped, as do other drainage fittings with that option.

I went ahead and fixed it and attached it for download. Because the Supply/Extract changed the product list had to change. See if this will work for you. 

Haha I cant post and .itm cause its not a recognized extention...thats ironic. Gonna have to bring this one up to the powers that be. Email me and Ill send you the .itm over email. dronson@asti.com