Orbit 57280 Female Pipe Threaded Auto Inline Sprinkler Valve, 3/4

Can i connect a garden hose to another garden hose through this unit or do i need an adapter? is it just a ght gender-reversing adapter?

Just installed a new valve and it works but buzzes pretty loud when its working. Is that normal?

Can it be powered directly by a 24v transformer (https://amazon.com/dp/b000vryvys) connected to a z-wave switch (https://amazon.com/dp/b075p1nc6s)?

will this replace orbit solenoid 57039-57?