Windscreen washer issue

[Ciscolad]

Hi, 

In trying to resolve a low spray issue by taking the rubber hose off of the plastic connector (is it called a non-return valve?), I used a bicycle pump to force pressure through the system to clear any blockage. I then snapped the nipple on the plastic connector the rubber tube connects from the water reservoir. Unfortunately, I can't get access to replace the white plastic connector. Can anyone confirm the name of the connector part and how would I replace it?