Results 1 to 16 of 16

Thread: Ok Boiler Guys, What's This Fitting?????

  1. #1
    Join Date
    Jan 2015
    Location
    Bellevue, Washington, United States
    Posts
    2,062
    Post Likes

    Ok Boiler Guys, What's This Fitting?????

    I'm trying to diagnose a hot water boiler that's having poor water circulation. I found this 1 1/4 fitting that's connected to the supply line and coupled with two dialectic unions. I think it's some kind of strainer but I just want to make sure before I drain the system down and take it apart. Thanks

    Name:  Northlake boiler fitting.jpg
Views: 476
Size:  74.8 KBName:  Northlake boiler fitting.jpg
Views: 476
Size:  74.8 KB

  2. #2
    Join Date
    Jan 2008
    Location
    New Jersey
    Posts
    270
    Post Likes
    It looks like it is a possible expansion joint. Can you look at it from the end ? You will see the bellows under the cover.

    Sent from my VS501 using Tapatalk

  3. #3
    Join Date
    Jan 2015
    Location
    Bellevue, Washington, United States
    Posts
    2,062
    Post Likes
    Thread Starter
    Quote Originally Posted by chander View Post
    It looks like it is a possible expansion joint. Can you look at it from the end ? You will see the bellows under the cover.

    Sent from my VS501 using Tapatalk
    Hmmmm. Well the fitting doesn't have any way to expand or contract. It's just a solid can with a union on each side. I was wondering maybe if it was some kind of magnet design to trap and debris in the pipework.

  4. #4
    Join Date
    Jan 2008
    Location
    New Jersey
    Posts
    270
    Post Likes
    If it is solid, I don't have a answer for you.
    This is what I though it was. I have used these for expansion. Metraflex_Expansion_Joints.pdf

    Sent from my VS501 using Tapatalk

  5. #5
    Join Date
    May 2021
    Location
    Arkansas
    Posts
    7
    Post Likes
    Expansion joint

  6. #6
    Join Date
    Jan 2015
    Location
    Bellevue, Washington, United States
    Posts
    2,062
    Post Likes
    Thread Starter
    Quote Originally Posted by Chopchop View Post
    Expansion joint

    Can you elaborate. The fitting doesn't slide or move in any way.

  7. #7
    Join Date
    Jan 2005
    Location
    Appleton MN
    Posts
    1,006
    Post Likes
    Quote Originally Posted by James Colver View Post
    Can you elaborate. The fitting doesn't slide or move in any way.
    I did a little checking and this is what it appears to be.Name:  8500.jpg
Views: 380
Size:  4.0 KB

    https://www.hyspan.com/series8500.html
    Far better it is to dare mighty things, to win glorious triumphs even though checkered by failure, than to rank with those poor spirits who neither enjoy nor suffer much because they live in the gray twilight that knows neither victory nor defeat. (President Theodore Roosevelt)

  8. Likes heatingman, JayMan7 liked this post.
  9. #8
    Join Date
    Sep 2002
    Posts
    29,938
    Post Likes
    I don't know but it looks suspicious like one of those magnetic 'ion / molecule / particle alignment' devices that were popular for a time. <g> And maybe still are - although I haven't seen one for a good while.

    PHM
    --------



    Quote Originally Posted by James Colver View Post
    I'm trying to diagnose a hot water boiler that's having poor water circulation. I found this 1 1/4 fitting that's connected to the supply line and coupled with two dialectic unions. I think it's some kind of strainer but I just want to make sure before I drain the system down and take it apart. Thanks

    Name:  Northlake boiler fitting.jpg
Views: 476
Size:  74.8 KBName:  Northlake boiler fitting.jpg
Views: 476
Size:  74.8 KB
    PHM
    --------
    The conventional view serves to protect us from the painful job of Thinking

  10. #9
    Join Date
    Jan 2015
    Location
    Bellevue, Washington, United States
    Posts
    2,062
    Post Likes
    Thread Starter
    Quote Originally Posted by retired btc View Post
    I did a little checking and this is what it appears to be.Name:  8500.jpg
Views: 380
Size:  4.0 KB

    https://www.hyspan.com/series8500.html

    Looks like BTC called it. Thanks man

  11. #10
    Join Date
    Dec 2004
    Location
    Chicago area
    Posts
    11,934
    Post Likes
    Definitely an expansion joint


    Sent from my iPhone using Tapatalk

  12. #11
    Join Date
    Oct 2009
    Location
    new jersey
    Posts
    560
    Post Likes
    Expansion joint. We have the same thing in the schools

  13. #12
    Join Date
    Jan 2010
    Posts
    22,860
    Post Likes
    Okay expansion joint 😃

  14. #13
    Join Date
    Apr 2007
    Location
    Pa
    Posts
    779
    Post Likes
    Expansion joint. Depending on the model that plug would be the packing cylinder. We have 6 expansion joints to replace this summer on a university steam system. Ranging from 4” to 18”.

  15. #14
    Join Date
    Nov 2011
    Location
    CO
    Posts
    9,470
    Post Likes
    Quote Originally Posted by HvAckid82 View Post
    Expansion joint. Depending on the model that plug would be the packing cylinder. We have 6 expansion joints to replace this summer on a university steam system. Ranging from 4” to 18”.
    what do you mean by the packing cylinder? it's on the non steam side of the expansion joint, but within the cylinder?

  16. #15
    Join Date
    Apr 2007
    Location
    Pa
    Posts
    779
    Post Likes
    They have that for water/hydronic systems. Picture a pipe and another slightly smaller pipe within the larger pipe. The smaller pipe/slip can move but needs to be sealed. There are different methods of seals/guides such as graphite and you can pump “grease” special product to help seal the graphite or other type. The slip/smaller pipe needs to be kept clean so the debris does not damage the internal guides. No one ever cleans them.

  17. #16
    Join Date
    Nov 2011
    Location
    CO
    Posts
    9,470
    Post Likes
    Ahhh, interesting, thank you, have never dealt with one.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •