How should I set up a number 11 for water trapping? Hagz? Drowning lock? Tangle? Long chain?

I normally just use a longer chain on them.

Trapping for what ? Different critters call for a bit different setup.
Dennis

Mink and muskrat the mink set miiiiiht get an otter but I doubt it.

Depends on your situation. I like a long chain and grapple, that way I can stake, or tangle depending on the situation.

The #11 is a great coon trap!

Of your using them for mink always keep in mind what could come along.I 've shuddered more than once seeing a competitors mink set staked with a wooden stake and wire.Our incidentals up here include otter,beaver,and coon(we have large coons here).How long do you think wires going to last?longer chain with a grapple or heavy weight like a large rock works great here.Fastening with wire works great out in a marsh on muskrats,but setting along streams or rivers ,at least in my neck of the woods is a different matter.

Most of the creeks and springs I trap on are too shallow for a drown set so I cable all of my foothold water sets off to saplings on the bank, or a big stout root. About a foot of chain on the trap and a 5 foot cable. I use cable because I have to walk in to a lot of these places and its just easier to pack then long chain.

Cable works,I just hate to see long lengths of wire used .

A very good coon trapper once told me "wire is a curse word on my line", meaning that is not to be trusted to hold a critter bigger than a muskrat that is caught in a foothold trap. Doesn't take much twisting or rolling to break wire.

I'd darn sure stake for otter and beaver and coon, if you do much muskrat trapping you will catch them on occasion. Wire has no place on my line either, I want whatever is in my trap. I've gone to all long chain on my rat traps, that works for me.

LOL, I've caught a few otter at mink lured sets, for mink.