Milt,
Elvis is an Erickson Air-Crane S64F, N179AC. Down under we have also seen Incredible Hulk (N164AC) and Georgia Peach (N154AC).
Yes, the bulb at the bottom of the hose contains the hydraulically driven pump, which can fill the 9,000 litre tank in about 40 seconds while hovering. Hydraulic lines run inside the hose I think.
The pump is only used for fresh water. The Scoop is used for seawater, as about 30 kts forward speed is needed to keep the engines and airframe ahead of the salt spray. I'm told the scoop method fills the tank in about 20 seconds.