Air in pipes - outdoor irrigation?

[Sophie Gorman]

Hello,
I recently installed a pretty DIY outdoor irrigation setup. It has a 4- way splitter coming off the spigot that supports 2 sprinklers and 2 lines to the irrigation.

And now I have air in my pipes which is causing issues with my washer and other things inside.

I'm guessing it has to do with the irrigation system. Do I need to install a check valve? Can you do this on a garden spigot? Or is there something else I need to do or that could possibly be wrong?

(I'm pretty clueless on all of this and have spent so much time trying to Google a solution)

Thanks!

 

[Mr tee]

Post a picture of the spigot and splitter, also explain what the issues are.