The split stock water trap comprises a plastic stock, which is in two parts, together with a flexible tube. The tube collects excess moisture which can be poured out by removing the blowpipe from the bagpipes.

As the stock splits in two the tube can be removed when seasoning a leather pipe bag. The split stock can be fitted to any pipe bag however it is most commonly used in leather pipe bags or synthetic pipe bags that don't have a zip.

It is available with either an imitation ivory ferrule or nickel ferrule.