Prest-O-Fit 1-0003 Blueline Hose Coupler The simplest way to connect your RV sewer hoses Provides a secure, push-on connection between Blueline Ultimate Sewer Hoses Can also be used to connect standard hoses when secured with clamps Prest-O-Fit Hose Coupler Provides a secure, push-on connection between Blueline Ultimate Sewer Hoses Can also connect standard sewer hoses