I had fluid coming out of the pipe and I let it flow through for a while to try to flush the system. I reconnected the pipe to the jet and that works o k too, but it seems to need to be primed by washing both front and back together. No water flows to the front jets when I do this and water comes out at a reasonable rate from the rear jet.
I am inclined to drain down the fluid in the container, flush the system with clean water and refill with fresh screen wash.
Thanks for all your thoughts and suggestions.
M M