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3" Horizontal Tankless Water Heater Z-Vent Kit + Damper-Backflow Stop

by Z-Flex
Original price $279.00 - Original price $283.95
Original price
$279.00 - $283.95
Current price $279.00


(1) 3" Universal Appliance Adapter (UAA)
(1) 3" x 1.5' pipe
(1) 3" x 1' pipe
(1) 3" x 90 degree elbow
(1) 3" Wall thimble
(1) 3" Termination Hood with backflow preventer


3" Horizontal Stainless Steel Z-Vent wall-hung water heater vent kit for Eccotemp i12-NG, Eccotemp i12-LP, Eccotemp FVI12-NG, Eccotemp FVI12-LP, 20HI-LP and 20HI-NG, 40HI-LP and 40HI-NG models. It also works for Paloma/Rheem models: RTG-53, RTG-42, PH-1, PH-20, PTG-42, and many of the Bosch tankless water heaters that use 3" diameter stainless steel venting.

Made in AmericaComponents

1x 2NVAFF3 - 3" Universal Appliance Adapter

1x 2NVP31.5 - 3" x 1.5' pipe

1x 2NVP31.5 - 3" x 1' pipe

1x 2NVE390 - 3" x 90 degree elbow

1x 2NVWT3- 3" Wall thimble

1X 2SVSHTD03 - 3" Termination Hood with backflow preventer

If using this kit with an Eccotemp heater that has a 2.5" diameter flue opening (such as the FVI12 or i12), then the 2.5" to 3" Vent Adapter, found in the Related Gadgets tab below, is required.

Your installation may require additional pieces. Please contact us for assistance, or browse the Single Wall Venting category here on

For example, this kit does not include a condensate drain pipe which may be required depending on your water heater manual guidelines and building code. This vent part with only the condensate drain can be connected to the UAA in this kit.

• Vent material: AL29-4C stainless steel, made in USA
• Certification: Tested to meet or exceed Underwriters Laboratories (UL) spec UL1738 and ULS636
• Approval: Cat II, III, IV venting
• Limited Lifetime Warranty


Z-Vent SVE Series IV Installation and Maintenance Instructions, 3" to 24", Single & Double Wall

Z-Vent Dimensional Specifications