Takagi AT-KJr3U-IN Installation Manual And Owner's Manual page 14

• A condensate collector is required for horizontal and/or vertical vent runs exceeding 5 ft. of
equivalent length (not including sidewall terminatons).
• A backflow preventor should be installed in the exhaust when the heater is installed in climates
subject to freezing temperatures.
General rules for vent terminations:
• Avoid locating the water heater vent termination near any air intake devices. These fans can
pick up the exhaust flue products from the water heater and return them to the building. This
can create a health hazard.
• Locate the vent termination so that it cannot be blocked by any debris, at any time. Most codes
require that the termination must be at least 12 in. (305 mm) above grade and anticipated snow
level, but the installer may determine if it should be higher depending on the job site condition
and applicable codes.
• A proper sidewall termination is required when the water heater is vented through a sidewall.
• Refer to the following pages for exhaust termination and air inlet clearances.
Approved Category III, Single Wall, Stainless Steel Venting Suppliers and Part Numbers
WARNING! Do not mix parts or fittings of different material types, and do not mix pipe, fittings, or
joining methods from different manufacturers. Combustion exhaust can contain carbon monoxide and
must be properly vented outside. Breathing abnormal amounts of carbon monoxide can result in seri-
ous injury or death.
Description
4" Straight pipe - 6" length
4" Straight pipe - 12" length
4" Straight pipe - 24" length
4" Straight pipe - 36" length
4" Straight pipe - 48" length
4" Adjustable straight pipe - 10"-18" adjustability
4" 45 degree elbow
4" 90 degree elbow
4" Sidewall termination (4"Termination Hood)
4" Vent termination tee
4" Rain Cap
4" Extreme weather rain cap
4" Horizontal drain tee
4" Vertical drain tee
4" wall thimble length 4"-7" wall thickness
4" wall thimble length 5"-10" wall thickness
4" 3-in-1 adaptor (F-F adaptor, condensate
drain, & back-flow preventer)
4" F-F adaptor
4" Backflow preventer w/ F-F adaptor
4" exhaust / 3" intake DV concentric termina-
tion - 5"-10" adjustability
4" exhaust / 3" intake DV concentric termina-
tion - 12"-18" adjustability
4" Sidewall termination, adjustable pipe
4" Wall Thimble, 3"-6" wall thickness
Heater Vent Kits
9007987005
9007986005
9007984005
9007983005
9007982005
9007985005
9007981005
9007980005
9007999005
9008144005
9007995005
9008145005
9007994005
9007993005
9008345005
9008346005
9008146005
9007979005
9007996005
9008147005
9008148005
9008899005
9008898005
14
Page
Z-FLEX®
NovaVENT™ Z-VENT™
2NVP4.5 2SVEPWCF0406
2NVP41 2SVEPWCF0401
2NVP42 2SVEPWCF0402
2NVP43 2SVEPWCF0403
2NVP44 2SVEPWCF0404
2NVAL4 2SVSPA04
2NVE445 2SVEEWCF0445
2NVE490 2SVEEWCF0490
2NVHTX4 2SVSHTX04
2NVTT4 2SVSTTF04
2NVRC4 2SVSRCF04
2NVWC4 2SVSHRC04
2NVHD4 2SVEDWCF04
2NVVD4 2SVEVDP04
2NVWT4 2SVSWTF04
2NVWT4L 2SVSWTEF04
2NVBFA4 2SVBFDPA04
2NVAFF4 2SVEEWCF0445
2NVBFU4
2NVHTC43S 2SVSHTC43S
2NVHTC43 2SVSHTC43
2NVBV4
2NVBT4
2ZVB04
n/a
n/a