Step 6: Heat Transfer Rod - Sealing it air tight
You don't want to mess this step up or it will get real messy. When I built the first one, I was having trouble creating a perfect seal and this area was the main problem. I have tried many methods to plug up the holes and this was the best solution I came up with. I just tested it and it works perfectly. If you have a better method of sealing, by all means go right ahead.
- Push the brass rod all the way through until you reach the inner wall of the next hole as shown in picture 2
- Get you Seal-All ready and place it on the Brass threads and the hole on the other side shown in pictures 6 and 7.
- Once that is done, grab the brass rod in the middle and turn it as if you are screwing it in shown in picture 8. This will spread the Seal-All adhesive all around the the holes which will hopefully fill in most of the gaps between the threads
- Screw until you cannot seal the threads inside the pipe shown pictures 9,10 and 11.
- Take the two 1/2" Pipe Reducing Coupling and screw them to both ends real tight. Use a wrench if you need to. Again, make sure the threads aren't visible in the inside.
- Smear Seal-All all around the couplings
- For best results, let it dry for 24 hours. It should be hard and rubbery after a day and It will become rock solid when completely dry.