2 portys, 1 your standard twin vac 135psi(Alltec or a grace) and 1 single vac machine about 50psi, would you think it's safe to use both at the same time in your average domestic house with regards to the house electrics.We would be using Rcd's, if the house was fitted with the modern trip box, would it just keep tripping out!
I just thought i would check with some of the more experienced guys on here before i try it out.