This little bugger: (part no 28628-11C00) I need one to pass rego and I cant stand the messy dribbles without one. The valves I have are frozen stuck. I couldn't find anything at supercheap and the staff had no idea what I was talking about. So instead of messing about with a nissan dealer, has anyone had luck unsticking a check valve? I'm not sure on their construction if its a ball and spring or a soft rubber flap... So I hesitated shoving something sharp down the guts. I can start with hot soapy water in an ultrasonic cleaner though I'm guessing that wont work. Maybe a blast of compressed air to un-stick it? Failing that, anyone know where I can just find an off the shelf cheap generic one from like repco, bursons or something. They don't have parts search on their websites, so I don't feel like wasting a weekend driving cross country to find a plastic $2 part. Cheers.