which way does the mains flow?

[renishawphil]

Can anyone tell me which way the mains flow please? i have a feeling its to the left of the picture but if anyone could confirm that would be much appreciated

I am trying to work out which is the service pipe to the house . Not very straightforward because of the pipe arrangement

Thanks in advance

 

[Ian H]

Right to left.

 

[renishawphil]

Right to left.

Thanks Ian