KENGUARD Drain Bags Features and Benefits Contoured design More even filling and complete emptying. 11/32" drainage tube Provides quick drainage, eliminates standing column of urine. Universal hanger Fits securely on bedrails and wheelchairs. Frequently Asked Questions Question Answer What is a Drain Bag? A drain bag is a urine collection device that is connected to a catheter in order to drain the contents of the bladder. The Kendall line of drain bags have a 2000ml capacity and have available features such as the SPLASHGUARD II Drain Spout, SAFEGUARD Needleless Sampling Port, and MONO-FLO Anti-Reflux device.