bile drains

My dad has 2 biliary drains (external and internal). He was told by interventional radiology that he drains particularly a LOT more than patients he has treated in the past. He gets dehydrated and loses a lot of weight when he lets the bile drain externally. His surgeon suggested refeeding the bile via a PEG tube. When he caps the tubes to internalize the drains, we're afraid of infection or blockage inside. When he uncaps it, he loses a LOT of fluids, sodium etc. Has anyone experienced this? any ideas or solutions? He has gall bladder cancer.