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AC Line set penetration sealing

Discussion in 'Mechanical Codes' started by DMartin, Jul 30, 2019.

  1. DMartin

    DMartin Registered User

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    So I went out to inspect on an AC install. Where the line set penetrates the wall they are using a putty. not too concerning except that it is a VERY malleable type putty (if that is the right word). I am looking at the IMC but can not find a required sealing method for this. can anyone help me out here I am not sure I like it. not sure it would keep out the elements very well. I can touch it with no pressure and mold it.
    Any help is appreciated.
     
  2. Pcinspector1

    Pcinspector1 Platinum Member

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    Dum..dum. used to seal the line set at the exterior wall. I have seen silicone used, comes in colors but I have not made it a point to demand either, just need it sealed. Also have them seal the sides and top of the A/C disconnect to prevent water intrusion.
     
  3. my250r11

    my250r11 Sawhorse

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    Ditto, usually does not matter what they use unless it is a rated wall assembly.
     
  4. DMartin

    DMartin Registered User

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    OK thanks it is sealed I guess.
     
  5. Pcinspector1

    Pcinspector1 Platinum Member

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    A product like Ideal duct seal and there is also a flashing boot out on the market but I've never seen it used, probably due to additional cost.

    You got to keep water, bugs and critters out.
     
    my250r11 likes this.

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