The "Big Mac" Valve serves multiple functions as a one-way valve, water trap and air redirect. The Big Mac inserts into the bottom of the blowpipe stock (via zippered bag) and features an Airstream valve that is protected internally and is easily accessed for cleaning. The section inside the stock allows for moisture to collect to be dumped later. Last, the right angle redirect forces air away from the pipe chanter reed delaying the time it takes for moisture to saturate the reed. A tube can be added to this product for further water retention and air direct.