I am thinking to buy a Digitech RP70 or 150, but there is no expression pedal with them

Don't Tell me to Buy The RP250 or 90, cause it's out of ma budget

I have a Vox Wah, so can i connect it with one of those and use it as volume pedal and when i push it to be wah??

*facepalm* no.
Hovercraft Falcon 100 "La Dama del Solaris"
ESP LTD Phoenix-1000
Epiphone Les Paul Custom Silverburst
You can with a Pod, dunno about a digitech
Quote by H4T3BR33D3R
Way to show everybody up jackass.

Guitar: _______________ Amp:
_ Ibanez SZ320 _________Fender Hot Rod Deluxe

you could probably modify your wah easily to have a "volume pedal mode"
Get off this damn forum and play your damn guitar.