Prest-O-Fit 1-0021 Blueline 90&deg; Clear Hose Adapter Secure, leak free connection Push-on connection to Blueline hoses without the need for clamps Also connects to standard sewer hoses Color: Clear Prest-O-Fit Hose Adapter Four bayonet hooks and an X-ring seal provide a secure, leak-free connection to most waste-valve outlets Provides a push-on connection to Blueline Ultimate Sewer Hoses without the need for clamps Also connects to standard sewer hoses Clear allows you to view when your holding tank is clean Clear 90 degree