Hi,
In this video it shows a OB very similar to mine.
http://www.youtube.com/watch?v=IlNd01rGk_o&feature=PlayList&p=9DB34D7F54E51CE8&playnext_from=PL&playnext=1&index=1
Notice the the stream of water coming from the OB at 28sec into the video.
Question is what if nothing comes out from there...