This is an updated verison of the first otter pipe I made. 8" corrugated pipe and 220 RBG.
Materials you will need:
3' piece of 8" corrugated pipe
Two pool noodles roughly 4" wide cut to 2' long
Two pieces of 4" PVC pipe cut 2' long
Four 4" PVC caps
PVC glue and cement
Spray paint
3/4" or larger plumbing strap
A sack of 1" long lag bolts
Drill bit and impact driver
Two medium sized eye bolts
10" rubber bungee strap, approx. 13" overall length with the two hooks
First I take the pool noodles and place them inside the 4" PVC pipe. You'll need to possibly shave down the sides depending on the width you have. Then glue and cap both ends of both pipes with the noodles inside. After that, I then spray paint both pipes a camoflague pattern.
Attach the PVC pipes to the corrugated pipe at about the middle mark with the plumber's strap as tight as you can with the lag bolts. Having the PVC 2' and the corrugated 3', attach so that you have about 6" of no PVC on both ends of the big pipe.
An optional part is to screw in an eye bolt inside the trap on the top part 8" back or so. You can use the eye bolt to wire a piece of bait that'll be waiting just behind a ready trap.
Cut the bottom 2/3 of the end of corrugated pipe off about 2 ribs deep on both ends of the corrugated pipe. If you set your conibears dog down you'll need to cut a notch in the middle of the recessed crescent that you just cut out.
To load the trap in the pipe, place it into position and then hook the bungee through the same spring eye on each spring over the top of the overhang on the pipe's end. To be able to hook them together, you're springs will probably be have to be pointing up. If you pull the rubber strap back about 3 ribs deep on the corrugated pipe and then pull your trap springs down, it will pull the trap tight up against the pipe with hardly any wiggle. If you're setting dog down, the notch you cut out in the middle of the bottom will facilitate a good fit.
I've tested the trap's ability to fire in the water and it works no problem. When it goes off, the bungee cord comes off too, allowing the trap to fall away from the pipe, which I think is a good thing. So if you do follow this set up, it'd be wise to crimp one of the S hooks to the spring eye so that you don't lose it.
Here's an otter's eye view of the pipe. There'll be a piece of fish hung up behind the trap. This trap is undyed, but before actual use will be to help it disappear. On a different trap I have the triggers bent out into a "T" shape. The triggers are under the waters surface and would be unseen to the oncoming animal. That's a trigger configuration that I use on just about all my water conibears, I just hadn't done it to the trap shown yet.
Both ends of this float will be loaded and have a piece of fish wired up behind them. I have fairly high hopes for this set up and am even expecting an occasional mink as well.
The overall weight of this setup is probably in the neighborhood of 25-30lbs.