LPG Supply

[whiskeryron]

We have a LPG tank at the end of the garden, when the supplier called today to renew stocks, because he had difficulty negotiating the right of way he has suggested another route to the tank which will require approx 50m of extra piping. My question is, if he connects extra piping will it need to be bled every tme or will the supply push air into the tank & will that be detrimental to the system ?
I did put this post into How it Works but as I had no answers I'm trying my luck here.