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 3-Piece Kit contains a Valve Adapter, a Bayonet Adapter, and a 90 Degree Bayonet Fitting, model #'s F02-3101, F02-3108, and F02-3112, 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 seals provide a gas tight, leak-proof connection, and the 90 Degree bayonet fitting fits 6 different types of sewer drain pipes, including threaded pipes in 3", 3.5" and 4" sizes.