[jburd964]

How will putting the vent pipe approx. 4 feet down stream from toilet effect it?

 

[Javiles]

Depending on how your setting up your venting wet vent / wet bend / if allowed by your code, you should be fine if within 5 feet of the W/C

 

[TheEplumber]

How will putting the vent pipe approx. 4 feet down stream from toilet effect it?

Assuming it is a properly installed vent it should be fine

 

[jburd964]

Thanks