Dk40 Injector line removal

[drjay9051]

Trying to loosen the injector lines on my DK40 to bleed out some air. I have tried pretty much every size wrench I have. None seem to fit!!

Anybody know the proper size?

 

[thepumpguysc]

They’re normally 17mm.

 

[drjay9051]

They’re normally 17mm.

Metric ! Had a senior moment. Thanks for the help