Should have added, the hole in pipe is tapered, Large at top end and small at outlet, this helps to increase pressure. So it would probably be better to disconnect the top end and inverting it when cleaning it out to have a better chance that all bits in the pipe will drop out.
It also seems very difficult to get parts for these sort of domestic things in North America, could reduce land fills and distributors and retailers pockets if it wqs easy to obtain parts.
Chexxer
August 2015