Z-FLEX 4" Z-Vent Water Heater Horizontal Vent Kit w/ Backflow

In most applications, kit contains the components you need all in one box to vent a 4" tankless water heater. Designed for horizontally vented heaters mounted to an outside wall. Back-flow preventer is included for cold climates. Includes: (1) Termination Hood (1) 4" x 90 Elbow (1) 4" x 1.5' pipe (1) 4" x 1' pipe (1) Wall Thimble (1) Universal appliance adapter with backflow preventer