According to the book Musical Instruments of the West, “air was pumped... into a perforated vessel (pnigeus) standing in a cistern of water, and from the pnigeus it was further directed into the windchest below [a series of] pipes, pressure from the water maintaining its steadiness. ”
Nagu on kirjas raamatus „Musical Instruments of the West ”,„ pumbati õhk... veetsisterni asetatud augustatud anumasse (pnigeus), sealt aga juhiti see vilede all paiknevasse õhukasti, sealjuures aitas veesurve tagada püsivat õhurõhku ”.