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  1. #1
    Join Date
    Feb 2005
    Location
    Upstate NY
    Posts
    4

    duct plugs used in balancing

    Does anyone know where I can get my hands on the plastic plugs that balancers typically use to plug the holes they drill in ducts? I did find them here, but they are in really large quantities. I'm looking for maybe a hundred (or even 500), but not thousands. Thanks a lot,

    Brian
    "Pick two: good, fast, cheap."

  2. #2
    Join Date
    Dec 2008
    Location
    Buffalo NY
    Posts
    3,127
    I think there is a place in Buffalo NY that makes them. There was a thread on this same subject last year. If you do a search you may find it. I will try to find the manufacture in Buffalo.
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  3. #3
    Join Date
    Oct 2010
    Location
    The very humid south
    Posts
    712
    search static pressure plugs

  4. #4
    Join Date
    Dec 2002
    Location
    Arizona
    Posts
    4,416
    Here ya go.
    http://www.nationalcomfortinstitute....ts.cfm?Cat=Air Balancing and Diagnostic Tools
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  5. #5
    Join Date
    Feb 2005
    Location
    Upstate NY
    Posts
    4
    thanks a lot guys. i actually found them on nationalcomfortinstitute.com (thanks for the link anyways jimj). got a pack of 500 3/8" plugs for $20. just what i needed.

    it's funny how widely they are used but how few supply houses carry them (or maybe they do, they just don't know what they are).

    brian
    "Pick two: good, fast, cheap."

  6. #6
    Join Date
    Jun 2005
    Location
    Near Chicago, IL
    Posts
    3,317
    I hear that Fastenal also carries those types of plugs.

  7. #7
    Funny cause I was just reseaching all this, luckily I talked to a balancer friend of mine.

    He likes the CAPLUGS CPT-3 with the center pull tab and red color. He drills a 3/8" dia hole which works well with 5/16" dia pitot tubes and these plugs fit that. The pull tab makes them much easier to get back out than the standard indented plugs balancers often use, plus the standard style plugs need a 1/2" dia hole although I suppose you can get smaller ones.

    Fastenal (looking online anyway) has these CPT-3 plugs for about 6.5 cents each and it looks like you can buy what you need instead of 1000's. I am planning on buying here in town because they want $8.50 to ship 200 plugs ($13.04) and you still have sales tax anyway.

    http://www.fastenal.com/web/products...x?sku=11130530


    If you go to CAPLUGS online then you are looking at a 1000 for $83.90.......or 5000 for $134.50 which really drops the price per plug clear down to 2.7 cents each....without counting the shipping that is.

    http://www.caplugs.com/productdetail...mno=CPT+SERIES

  8. #8

    more plug info

    Now have found out (from balancer I know) that for smaller round stainless ducts like is used for fume hood exhaust, he likes to use a Dwyer 1/8" diameter pitot tube with holes plugged by Caplugs TP-6 which are 0.20" diameter......so probably a 3/16" bit (for 0.1875") or 13/64" bit (for 0.203"). He said snip off some of the 1/2" length of the TP-6 plug if you don't want that much sticking into the duct.

    He likes the 1/8" diameter pitot tube for the small stainless ducts for two reasons - 1) the smaller holes are much easier to drill into the stainless and 2) the owners and commissioners raise less issues about the smaller holes in the stainless ducwork (sometimes metal plugs or welded-in threaded plug ports are required, but usually this requirement is overlooked by the engineers who usually don't even know you need some straight duct to get a decent traverse anyway).

  9. #9
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Quote Originally Posted by jimj View Post
    Here ya go.
    http://www.nationalcomfortinstitute....ts.cfm?Cat=Air Balancing and Diagnostic Tools
    Poopy plugs with no center pull tab.
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  10. #10
    Join Date
    Dec 2002
    Location
    Arizona
    Posts
    4,416
    Quote Originally Posted by mark beiser View Post
    Poopy plugs with no center pull tab.
    LOL, I will agree those red plugs with pullouts look pretty nice! No more NCI plugs for me.
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