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  1. #1
    Join Date
    Sep 2002
    Posts
    607
    next week i have to change 2 zone valves on some rads in a high rise apartment.We just took over this building and here is the problem.There are no isolation valves for the rad.The only isolation valves are at the risers which would cut heat off to 10 apartments. My question is there anyway to remove these valves without shutting down a whole wing of the building. I tried to talk landlord into waiting till spring.These rads are just in the bedrooms and they have lots of heat in the rest of the apartment. I figure as soon as i drain down a riser that is when all the problems will start,air locks etc. Any suggestions?

  2. #2
    Join Date
    Aug 2003
    Posts
    242
    On smaller copper lines you can sometimes use a pinch off tool. You can also call a company to freeze the lines, but that can be expensive.

  3. #3
    Join Date
    Jan 2004
    Posts
    389
    GOOD LUCK
    The fact is, you have to shut down the wing like it or not there is no other reasonable way. You better hope the main valve hold also. I would install sucution ball valves and then you have a way to isolate the unit and do your thing.
    The good thing with sucution ball valves, you dont have to solder them in, its fast and easy even if the lines are leaking by.

  4. #4
    Join Date
    Feb 2003
    Posts
    102
    what type of valve are you replacing.
    some valves,like the b and g zone valve,have a replacable
    valve kit so the valve body does not have to be changed
    you can close your header valves,relase positive water pressure ,allowing water to still be in the piping

  5. #5
    Join Date
    Sep 2001
    Location
    East Stroudsburg, PA
    Posts
    13,215
    Originally posted by bku46
    GOOD LUCK
    The fact is, you have to shut down the wing like it or not there is no other reasonable way. You better hope the main valve hold also. I would install sucution ball valves and then you have a way to isolate the unit and do your thing.
    The good thing with sucution ball valves, you dont have to solder them in, its fast and easy even if the lines are leaking by.

    What is a "sucution" ball valve?

  6. #6
    Join Date
    Jan 2002
    Location
    tip of the mitt
    Posts
    1,974
    If it's water in the system I would freeze it. A co2 freeze kit costs about 4 to 5 hundred bucks. There are some threads in the tips forum about this.
    I have my own little world. But it's OK...they know me here.

  7. #7
    Join Date
    Dec 2001
    Location
    Chicago, N/W burbs
    Posts
    8,004
    many zone valves, taco & HW you just change the head
    R2B4BTU

  8. #8
    Join Date
    Dec 2001
    Location
    Chicago, N/W burbs
    Posts
    8,004
    Then again, if you gotta drain & pruge well, you get paid by the hr and it's not your fault the system was designed with no foresight of servicability. Beats bein on a snowy roof all day!

    R2B4BTU

  9. #9
    Join Date
    Nov 2002
    Location
    NJ - WORK IN NYC AREA
    Posts
    1,434

    Question

    Same question, What is a suction ball valve?
    "My hands are for sale"

  10. #10
    Join Date
    Dec 2003
    Posts
    14

    Talking

    sounds like a co2 freeze kit is the winner .i did alot of work in a local hosp with basically same problem got them to buy a kit and worked great but make sure you have alot of co2

  11. #11
    Join Date
    Dec 2001
    Location
    Chicago, N/W burbs
    Posts
    8,004
    Originally posted by mrhvacmechanic
    Same question, What is a suction ball valve?
    sounds kinky whatever they are
    R2B4BTU

  12. #12
    Join Date
    May 2001
    Posts
    358
    If you had valves they would probably crusted up and leak through and make a bigger mess than you have.

  13. #13
    Join Date
    Jan 2004
    Posts
    109
    just like the others, but do you install the suction ball valve with a white or bluue sky hook

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