The Valterra EZ Coupler system provides easy-to-use products working in unison to help make your sewer interaction as fast and as painless as possible. This Valterra EZ Coupler 2-Piece Kit contains a Valve Adapter and a Bayonet Adapter, model #'s F02-3101 and F02-3108, respectively. These are self-threading adapters offering secure connections. These pieces do not require clamps to secure the fittings to the hoses, and they will work with both right-handed and left-handed coil hoses measuring three inches in diameter. The interior seal provides a tight, leak-proof connection.