Geno:
Talk to your local VFD and get fitting that match up with what they use. Then you can get adapters to match up to a garden hose.
Thanks, I'll do that again but as I recall the guys told me standard 1.5" fire hose fitting would work on the drain I'd use for the winter. Actually they said they probably have the adapters too.
But, their right down the road, and they also come by when they "exercise" the trucks so I'll make sure to ask again.
Geno