Re: my version of a Cleo Hogan Trap opinions please.
1/6 = 0.166 Just in case anyone tries to use these numbers for anything.
I ran out of time yesterday while posting this. Tape will work. But also keep in mind the gap is half of the difference. Assuming the pipes are positioned evenly. So a difference of 0.193 when set up correctly would leave a gap of 0.0965. #8 hardware cloth is 0.125. but this requires meticulous placemen of the two pipes which is not likely to happen.
Better yet is the sch. 80 pipe. 2.5 inch has an OD of 2.875 while the 3 inch has in ID of 2.9 for a difference of 0.025. This creates a gap of 0.0125.
I have done a lot of work designing things that will slip inside other things. and this is pushing the limit to what I consider a good slip fit. It would require fairly accurate placement of the pipe or they will simply bind. I still consider it the best combination for this application. Schedule 80 pipe may be a little harder to source.
I have not seen a trap out yet that was placed nice a neat against a flat surface. so their is still the issue of how to box in or enclose the entrance to the hive to then produce a nice flat surface to mount a toilet flange on. I have attempted locations such as the soffit of a roof where the soffit kept the same pitch as the roof. creating basically a triangle shaped space. I have found them int eh corner where a brick chimney met the wall of the house. Also the top of a pillar at the corner so you have both an outside and two inside corners to deal with all at the same time. I have also found them at the trim of a window which is the closest to a flat surface I have seen. They have had their entrance in the valley of a roof. Never have I found the surface at the entrance of a hive to be the same twice. I woudl be interested in hearing ideas on how to transition from this endless geometry to a flat surface where the flange can be mounted.
Significant Minority vs Insignificant Majority, 20% of causes produce 80% of the effects.