Being able to strike in the drones every time without failure adds confidence to your playing. Producing a clean cut-off at the end of a set is an absolute must, in particular for pipe band players.
The ProValve valves control the flow of air to the drones, allowing for the drone reeds to strike in without failure. In addition, the valves allow you to cut off the drones with sufficient air left in the bag.
https://kiltsandmore.com/bagpipes-accessories/valves-adaptors/bagpipe-drone-valves/proflow-drone-valves-:p210505:c224:len.html
ProFlow Drone Valves
