Hollister Bedside Drainage Collector System with Anti-Reflux Valve 12" L 2000mL Hollister bedside drainage collection system is a latex-free system with an anti-reflux valve to prevent backflow, a sample port, and a sterile fluid pathway. Easy to use; secures to bed rails by integral bed hangers; Easy-to-use drain valve that requires minimal dexterity. Safely, securely attaches to most conduction devices.