Excellent! I love projects made from plumbing parts! Is that a toilet flange at the bottom? Awesome. How did you get it to come together in such a perfect cone shape?
I think you need to find a good way to ground it. PVC builds up static electricity like nobody's business...
Yes, uses 2 toilet flanges, (4" & 3"), and one 3" coupling, piece of 6" pipe and a stub of 3" pipe, plus smaller pipe for the inlet/outlet.
Making the cone is fairly easy. Run a strip if painter's tape around the end of the pipe & overlap, cut with razor knife at the overlap. Remove the tape and stick it onto a flat surface. 6" pipe is just a bit over 20" in circumference, so set a pair of dividers to 1" plus a smidge, and walk it down the edge of the tape. If it comes out near exact on the end of the tape, good. If not, slightly adjust the dividers and repeat. Repeat until the last segment on the tape is within a 1/16" or so of the same size as the rest. Doesn't have to be perfect.
Now use the dividers to walk around the end of the pipe, dividing it into 20 sections. Next take a framing square and transfer one of the marks to the other end of the pipe, 6" from that end. (Draw a line around the pipe at the 6" mark). Now, mark off one space on the 6" line. Divide this space in half. Then, starting at the 1/2 mark, go around the 6" line with the dividers (same setting), but now only mark off every other mark.
You now have 10 marks on the 6" line, and 20 on the end of the pipe. Starting at the end of the pipe with the mark you transferred to the 6" line, draw a line from that mark to the mark on the 6" line that is 1/2 space over from the start. Move to the next mark in the end of the pipe, and draw a line to the same 1/2 mark on the 6" line. This will make a triangle.
Put some xx marks on this triangle, as it gets cut out. On the end of the pipe, skip to the next mark, make a line to the next point on the 6" line (2" from the point of the first triangle). From that point on the 6" line, draw another line to the next point on the end of the pipe. X out that triangle. Repeat all the way around the pipe. When done, you should have 10 triangles on the base of the pipe, and 10 1" spaces between them. On the 6" line, you should have 10 triangle points with 2" spaces between them.
I draw the lines with a sharpie, a new one leaves a line that is just the width of the sabre saw blade, making it easier to saw the triangles out. The straighter you can keep the cuts the easier to glue up.