A balloon assembly for an anorectal manometry catheter may include a three-part tube and a balloon mountable on the tube. The three-part tube may include a flexible proximal connection tube (PCT), a flexible distal connection tube (DCT), and a semi-flexible transfer tube that is interposed between and connected to each of said PCT and said DCT. The balloon may have a first opening connected to a first end of the transfer tube and a second opening connected to a second end of the transfer tube which is opposite the first end of the transfer tube. The three-part tube may be configured to be slidable along and over a catheter in a first direction, with the DCT slid first. The three-part tube may also be configured to be slidable over the catheter in the opposite direction such that the PCT is folded onto itself and completely contained in the transfer tube.
