Nothing's worse than stale, warm water coming from your hydration pack - unless it's a leak. For both of these scenarios, upgrade or fix your existing tube with this innovative kit from Hydrapack. The basics - a tube, connector, and bite valve - attach to your existing setup to give your water a crisp, fresh taste.. . 36 in. TPU tube kit. Includes a universal 1/4 in. diameter drink tube, a Blaster(TM) bite valve, and Plug-N-Play(TM) connector. Durable design. To clean, use the Hydrapack Tube Brush. Imported.