Watch your grey water level through this transparent 3-inch cap without removing it from your waste valve. The bayonet fitting secures to all standard black waste valve systems, and the attached strap ensures it doesn’t roll away during setup or breakdown. A durable seal prevents odour and spills, making this a practical addition to any RV’s hookup kit.

• Bayonet attachment, 3-inch diameter
• Clear plastic for capacity monitoring
• Includes retention strap
• Hose-ready connector port