hi there i need some help i have been up to the local builders merchant this morning the manager was ranting at one of the staff for letting somebody leave the wrong gas bottles foe exchange i did notice a gaslow bottle in with them all so i offerd to take it of his hands the reply was put it in your van thats one less to get rid of so i need to know what i need to connect it to the motorhome and be able to fill it the motorhome is a 1991 compass drifter