Eccotemp 3″ x 6″ Back Flow Preventer
This Z-Flex 6″ backflow preventer is 3″ in diameter. This is a must for vertical tankless water heater installations. The damper (backflow) prevents freezing air from coming back down through the vent stack and potentially causes freeze damage to the tankless water heater’s heat exchanger, which is not covered under warranty. This single-walled, stainless steel, category II/III venting accessory has gasketed connections for a seamless installation.
Features
Installation: Venting
Dimensions: 8.00″ x 8.00″ x 6.00″






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