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I installed a new gas heater with a condensing unit in 2019 winter. Here is the detail.

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My question is...

Every year, I'd better pour some vinegar after opening the cap of the picture? If yes, how much?

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Here is what I found regarding my question.

https://todayshomeowner.com/video/how-to-clean-an-ac-condensation-drain-line/

(I am thinking of vinegar instead of bleach. Please check the video at 40s.)

https://aplusairconditioning.com/clean-ac-condensate-drain-line-vinegar/

Thank you so much for your advice. :)

  • It is draining condensate,essentially distilled water ; what do you think you are removing ? Haven't cleaned mine in 25 years but the service guy has blown on the tube with his mouth to make sure it is clear. – blacksmith37 Jul 20 at 1:15

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