Osprey Hydraulics Bite Valve Replacement Bite Down If you have an Osprey Hydraulics Reservoir and need a new bite valve, then you're in the right place. The Osprey Hydraulics Bite Valve Replacement is the all-new, next-gen bite valve that is compact while still delivering great flow, with a smooth on-off valve that is easy to operate one-handed. It installs on any 0. 25" / 6. 35mm hose. Features Great flow with a smooth on-off valve Easy to operate with one hand Installs on any 0. 25" / 6. 35mm hose | Osprey | Hydraulics Bite Valve Replacement Valve Rep Hydration Pack