Rear washer pipe blocked

[Madwelshman]

Hi.
Has anyone had issues with the rear window washer pipe getting blocked and resolved it.
I replaced the pump and cleaned the water bottle and filter.
I took the spoiler off and the jet is clear
I tried soapy water via the pump
And I’ve tried compressed air back down the pipe 250kpa
But no joy, there is no leak because the water dose not move.
I have also looked on line for a diagram which way the pipe runs but am unable to find one.
Any advice would be appreciated
Thanks

It’s ok, found a non return valve by the spray jet which is blocked, just in case anyone else has the same issue