Stick to a hose clamp, a constrictor knot, is not something that you are going to clamp a hose with. I was in the merchant marine for many years, and most of that old stuff was used in desperate times, when they didnt have the right equipment, and is only used now (in the merchant marine) to show off you know more knots than the next guy. Its like puting an eye splice on a wire, everyone in my day could do it, but it wasnt (even then) as strong as fitting a couple of buldog clips on the wire to hold it.
You would never get enough purchase on that knot, to keep a hose under any sort of pressure ie a garden hose connected.
I remember someone at sea, showing me how to tie a "thief knot" it was a reef knot, or a square knot, but instead of the two ends being at the top, or at the bottom, one end was at the top, one end was at the bottom, he said "you can tie your kit bag with this, and if someone goes into it, you know they have been there" i said, but suerly, if you find some of your gear missing, you will know someone has been there "he said yes, but with this you know from looking at the knot if someone has been there, because they will replace your thief knot, with a reef knot, I said, "what if they replace it with a thief knot, because they know that game" he said, then you wont know they have been in your bag" i said, well not until you find out what is missing, so it is not much good is it, better off with a bycle lock.
