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  1. #40
    Join Date
    Jul 2008
    Location
    Nova-Scotia, Canada
    Posts
    453
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    I usually just pour a gallon of draino in. A wicked awesome plumber gawd told me is the best way ever.

  2. #41
    Join Date
    Mar 2012
    Location
    Virginia Beach
    Posts
    20
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    Quote Originally Posted by jjacochran View Post
    I use a sludge sucker but a Waterhouse works best just push water up pipe until you get a good head on it and release. Clean water will flow causing a vacuum and pull all kinds of gunk out behind it.
    that's what i used to do, works great

  3. #42
    Join Date
    Mar 2012
    Location
    Virginia Beach
    Posts
    20
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    A self cleaning trap work great too. When you have room to install the trap low, every foot will provide .43 psi from the static head pressure. I have done this on package units installed on adapter curbs that gave me about 4 feet of riser so if it clogged at the trap, the pressure was about 1.75 pounds from the weight of the water and would blow itself out - self cleaning. I would imagine this would work great on a residential application with the unit installed in an attic and the trap at the ground level, 15 feet will give about 6.5 psi

  4. #43
    Join Date
    Dec 2010
    Location
    Smyrna, TN
    Posts
    41
    Post Likes
    Quote Originally Posted by rmdean View Post
    A self cleaning trap work great too. When you have room to install the trap low, every foot will provide .43 psi from the static head pressure. I have done this on package units installed on adapter curbs that gave me about 4 feet of riser so if it clogged at the trap, the pressure was about 1.75 pounds from the weight of the water and would blow itself out - self cleaning. I would imagine this would work great on a residential application with the unit installed in an attic and the trap at the ground level, 15 feet will give about 6.5 psi
    Until it became double-trapped from laziness of poor drain installation. Dips and sags are prelevant on an attic drain line in my area. Im not sure what it is, but apparently i missed the ammendment in physics class of water flowing downhill...unless it applies to an HVAC system

  5. #44
    Join Date
    Nov 2015
    Location
    Mississauga, Ontario
    Posts
    219
    Post Likes
    Are you guys talking about 636?

  6. #45
    Join Date
    Jul 2014
    Posts
    30
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    Yeah I do the shop vac ---) plus noise validates I'm working during a tune up

  7. Likes samgevas liked this post
  8. #46
    Join Date
    Oct 2016
    Location
    NC
    Posts
    41
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    How about just installing a union & use nitrogen? No need to over complicate things.

  9. #47
    Join Date
    Sep 2002
    Posts
    26,300
    Post Likes
    But unpressurized nitrogen wouldn't do anything to clear a drain.

    PHM
    -------

    Quote Originally Posted by Employee856 View Post
    How about just installing a union & use nitrogen? No need to over complicate things.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  10. #48
    Join Date
    Mar 2013
    Location
    Billington Heights, NY
    Posts
    21,628
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    Quote Originally Posted by glennac View Post
    Unbelievable. Just pour one to two cups of bleach in the drain line at the coil. It will clean out in 5 min on it's own.

    Then check the slope and make sure you have a minimum of 1/4" slope all the way to the drain termination to avoid future fungi growth in the pipe stopping it up. Simple. Thank you very much
    well sanitizer tablets in the trap work pretty well for a longer term cleaning agent. They store pretty easily in a medicine bottle and can rattle around without a mess in the tool box.

  11. #49
    Join Date
    Apr 2008
    Location
    Delray Beach, Florida
    Posts
    451
    Post Likes
    Contractors need to use what they think is best. You are all professionals and are all doing what is best for your customers.
    I can tell you thoigh that when I first came out with the SS1 float switch before any codes nobody wanted it ecause tgey said they would lose service calls. The floT switch saves thousands in water damage and you still get a no cool call. Very hard to introduce anything new as we are all creatures of habit including myself.

  12. #50
    Join Date
    Mar 2014
    Location
    Ottawa,ON
    Posts
    243
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    Hot water works too


    Sent from my iPhone using Tapatalk

  13. #51
    Join Date
    Apr 2008
    Location
    Delray Beach, Florida
    Posts
    451
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    White Vinegar Too!!

  14. #52
    Join Date
    Aug 2009
    Location
    Maine
    Posts
    8,115
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    I have 3 salad units to clean the drains on Monday told customer to remove everything form the units. C02 and Gallo gun will be used. Freezer on Tue, wrap a piece of bare wire around pan heater and stick one end down the drain. Fingers crossed for that one.
    Dynamite could be an option. (:-

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