Saab: Windscreen washer question

Hi,

Can someone please tell me if the L shaped gizmo, which i suspect is a
valve, is necessary for a windscreen washer to work correctly.

My washer wasn't working, but after removing the gizmo, works fine.

TIA
Ash

Ash wrote:
 

It's a non-return valve. The idea is to stop fluid in the line
from draining back to the reservoir. It's nice to have, because
you get instant squirt, but not essential.

--
Grunff