The Camco 4-in-1 Sewer Extension is ideal for reaching recessed dump stations to keep everything flowing smoothly. By elevating the sewer elbow out of a recessed sewer inlet, the 4-in-1 Sewer Extension streamlines the hose, reducing unwanted kinks and bends. The 4-in-1 Sewer Extension fits between the 4-in-1 Adapter and the elbow and extends the adapter 3". This sewer extension is clear, allowing you to see when the tank is empty. It locks securely to help prevent spills and is compatible with any Camco 4-in-1 Adapter.• Extends the attachment height of your 4-in-1 adapter 3" for recessed dump stations• Fits between Camco 4-in-1 adapter and elbow• Connects to any Camco 4-in-1 adapter• Clear extension allows you to see when tank is empty• Securely locks into place to help prevent spills Fits between the 4-in-1 adapter & the elbow & extends adapter 3"" Clear extension lets you see when the tank is empty Locks securely to help prevent spills