Takagi Vent Question

[Joseph Skoler]

Hello,

I have a Takagi TK-110U to install.

Venting with be to the side about 2' through an external wall using a wall thimble and sidewall termination kit (9008004005).

Do I need the Universal Appliance Adapter (F-F adapter, condensate drain, & back-flow preventer) (9008146005)?

I'm specifically interested in whether I need the condensate drain (of if I can just plug it off and it will drain out the sidewall vent terminator(hood))?

Thank you!

https://www.takagi.com/media/59163/100269776.pdf

 

[Fitter30]

Backflow needed for freezing weathered. Condensate drain not needed if less than 5'. Look at this fitting 90* with thimble 9008899005 page 10

 

[Sponsor]

 

[Joseph Skoler]

Backflow needed for freezing weathered. Condensate drain not needed if less than 5'. Look at this fitting 90* with thimble 9008899005 page 10

I do have that 90*, as well as the 3 in 1 F-F/Condensate/Backflow fitting.

And, it's less than 5' to (and through) the external wall.

I'd really prefer to not have to put a hose on the condensate port on the fitting, but I'm concerned that if I just cap it (or stub with cap), it will fill up with condensate instead of just drain out the end of the vent.

Thank you!

 

[Bannerman]

Condensing appliance exhaust vents are typically required to drain back toward the appliance. Any condensate that does form within your short exhaust run, should drain back into the WH, to be discharged through the condensate drain connection at the bottom of the WH.

The fitting with the drain port is intended for longer exhaust runs where there is likely to be a larger volume of condensate forming within the piping. The other purpose is to drain away rain water that may enter the vent when discharged vertically above the roof.

 

[Fitter30]

Need to run a hose with neutralizer condensate has to go somewhere.

 

[Joseph Skoler]

The Takagi TK-110U is a non-condensing WH.

The manual just says the condensate vent adapter is needed for runs of 5' or greater.

No other mention of dealing with condensate.

 

[Fitter30]

I screwed up this boiler is a non condensing just a Ultra low NOx doesn't have a energy star label. There is no drain because there isn't any condensate.
https://www.takagi.com/products/tankless-water-heaters/tk-110u-i

 

[Joseph Skoler]

Whew! Thank you for looking into it.

So, can I use the 3in1 to take advantage of the backflow and just put a cap on the condensate stub?

 

[Fitter30]

Whew! Thank you for looking into it.

So, can I use the 3in1 to take advantage of the backflow and just put a cap on the condensate stub?

Where is this condensate stub? Manual doesn't show one off the boiler.

 

[Joseph Skoler]

The stub is off the universal, F-F backflow preventer condensate trap vent pipe component:

http://www.takagi.com/products/venting/parts/4-universal-appliance-adaptor

 

[Fitter30]

If the flue is 5' or less it can be capped off. Brass or stainless compression cap.

 

[Joseph Skoler]

If the flue is 5' or less it can be capped off. Brass or stainless compression cap.

That's great to hear.

I was concerned that there might be a double wall in the fitting and the condensate would just sit there forever (never a nice thing) if I capped it.

Thank you!