Having played the highland bagpipes for a couple years now and having just finished a course on maintenance, I was greatly interested in building my own set of pipes just for fun. A few days later, a duct-tape and CPVC bagpipe emerged!
Assembly (from having taken out the parts to having a playable instrument) takes roughly 4-5 hours.
Here's a video of me with my second iteration of PVC bagpipes! Among the improvements are a freshly crafted duct tape bag, valves and a screw tuner for the drones, and CPVC drone stocks instead of vinyl tubing.
(Just a side note... the drones were HORRENDOUSLY out of tune in this video. They can sound better, really!)
And just for fun, here's an earlier video of me playing the Star Wars theme on them (before we added the bag)
Step 1: Parts and Tools
For each of the drones and the chanter (i.e. one drone or chanter = one set of these parts. My pipe had a chanter and two drones):
1/2" CPVC pipe, variable length
3/4" CPVC Cap
3/4" CPVC Coupling
3/4-3/4-1/2 CPVC Pipe T (the 1/2" comes out the side)
3/4" CPVC pipe lengths - two 1" cuts and a 1.5" cut. For the drones get an additional 6" cut)
A few squares of plastic bag, roughly 2" by 2".
Waxed hemp or regular masking tape
For the bag:
4X 2" lengths of OD vinyl tubing
For the blowpipe:
2' OD vinyl tubing
Parts listed in my Check valve instructable
A sharp knife
Drill (preferably a drill press)
You'll End Up With:
1 Duct Tape Bag
1 Bass Drone
1 Tenor Drone
1 Blowpipe + Check Valve
Which can then be assembled into a set of smallpipes!