Originally Posted by tbzep

If you don't find one, you easily can make a tube coupler by cutting a section out of a larger diameter tube and gluing the section inside as reinforcement. It's a simple and easy process. Slip the cut piece of BT inside the BT-30 tube and mark the overlap to make the 2nd cut. I've done it with BT-20 all the way up to 8" HPR stuff.