yes, I took another look and pulled off the fitting that the vacuum line ( going to the brake booster) would attach to. This is the fitting that is screwed onto the pump, the parts came from that it is an additional check valve.very flimsy. I am not really sure how the three pronged washer stays in place, but I understand where all 3 parts go. This may have been a redundant valve or meant to keep oil out of the line in case of failure of the pump or other valve. Seems rather cheap. I will leave it out also, as I am sure even a new one will wind up in the wrong place eventually.