4" Tankless Water Heater Vent Kit

Regular price $265.30 USD

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.


  • (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
  • Up to 30 Days to Return
  • 20% Restocking Fee
  • Freight Covered by Customer

Z-Flex Z-Vent is rated AL29-4C and is approved for Category I (vertical only), II, III & IV applications and is designed for use with boilers, high efficiency gas and oil heaters and water heaters where cool flue gases are vented under pressure. Z-Vent contains a built-in, fail-safe gasket and locking band connection. No sealant is required.