the distance between drain trap and vent fitting

[30all]

I need to move kitchen drain to left along with window. Search for the codes about boring 2x4 stub in exterior wall, it seems doable. but I don't know if I need to move vent along with drain. Since I only need to move 1 or 2 feet from current spot, I may be able to get away from moving vent?

I don't want to bore 2 holes in 2x4 for both drain and vent. if I have to move vent, then I will route the drain pipe from basement and come out from floor into sink base cabinet.

Check 2 plumbing books, they says 2 different numbers.

Thanks!

 

[Terry]

For most kitchens, the trap arm is 1.5"

the vent can be within 42" in the UPC code.

 

[Sponsor]

 

[30all]

Terry, thank you
The 1.5" you are refering to is the size of drain and trap, not length, right?

the 42" distance is from p-trap to the vent T fitting?