Turbo water bolt size?

[Kyogie12]

I need to know the size of the bolt on a 1g water pipe, little left of the middle of the pipe after the water pump. I think it's the water feed? Either way i need to know the size of that bolt, i gotta cap it up.

 

[19Eclipse90]

M16 x 1.5mm pitch. And it's the return.

 

[Kyogie12]

Thank you good sir! Just what i needed. I always get return and feed for water confused when i'm not looking at it haha.