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  1. #1

    Hot Water Question

    I have a taco 007 IFC pump in between the boiler and the hot water tank. The water on the boiler side is very hot, but the water in the pipe on the tank side is cold and the pump appears to not move. There is no hot water.

    I have a Buderus boiler that is trying to heat the water in the tank (set to 120) and continues to cycle on heating the water up to 200 on the boiler side. Unfortunatley, the hot water isn't making it to the tank.

    This install was done 12 months ago. I spoke to two plumbers yesterday afternoon, one of whom told me it sounded like I needed a new hot water tank (????). The other told me the pump to the tank is probably shot.

    Although my water tank is 8 years old, I don't think its the problem. Does it make sense that a one year old pump fails?

    Thanks in advance for your help.

  2. #2
    Join Date
    Nov 2004
    Location
    NJ
    Posts
    1,204
    Quote Originally Posted by stall View Post

    Does it make sense that a one year old pump fails?
    Yes, new pumps fail when they are not sized correctly. You don't give enough information in your post, but I'd look to see if that 007 is large enough for the application.
    Ed J

  3. #3
    Thank you Ed for your response-I appreciate it.

    I don't know anything about whether the pump is the right size, it was installed as part of my new boiler system in Sept 2006 when all of the pumps and piping were changed.

    Since I know very little about these systems, I just wanted to get some input from others who know about with this stuff given the fact that I have two widely varying opinions, which also vary widely in cost.

    It just seemed to me that if the water is hot on the boiler side of the pump and cold on the tank side of the pump and the boiler computer is registering that the water in the tank is cold (and trying like hell to heat it), that replacement of the water tank isn't the answer.

  4. #4
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,744
    could be a pump or could be a control, doubt it would be the tank.......


    as far as a part failing the only thing i can tell customers is that they are machines built by humans and stuff happens.........

  5. #5
    Join Date
    Nov 2007
    Location
    Chicago
    Posts
    76
    You need to talk to a pipe fitter or hvac guy not a plumber when it comes to hot water systems.

    That pump is pretty small. Assuming that its a 100,000 BTU/hr boiler, that pump will deliver 10gpm with 5 feet of head. That is probably barely enough to push the water through the boiler. Need more info to give you an answer.

  6. #6
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    if the boiler is 200 and the pipes going to the water heater are cold or just warm then the pump isnt working imo

    the water heater has nothing to do with the boiler side. It would be differant thing if the water from the boiler going in was hot and coming out of the water heater and back to the boiler was cold then the pump would be to small or not pushing enough from some reason

    it is also possible that the flo control valve is stuck closed and not letting the water flo

    have the plumber that says the pump look at it because he is on the right tract

    if the pump were to small then you would not have enough hot water or very long recovery time.

  7. #7
    Join Date
    Nov 2001
    Location
    Moose Jaw, Saskatchewan, Canada Occupation:Interprovincial Plumber, Commercial Gasfitter Interests:
    Posts
    2,412
    Quote Originally Posted by hvacconsultant View Post
    You need to talk to a pipe fitter or hvac guy not a plumber when it comes to hot water systems.

    That pump is pretty small. Assuming that its a 100,000 BTU/hr boiler, that pump will deliver 10gpm with 5 feet of head. That is probably barely enough to push the water through the boiler. Need more info to give you an answer.
    Actually a 007ifc is about 9gpm at 5'.

    But what do I know, I'm just a dumb plumber.

    BTW, what does 100,000 btu have to do with anything? If it is a cast iron boiler, it may be more than big enough.
    I love my job, but paydays Thursday

  8. #8
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,119
    Could be the circ, could be a control.

    Call your contractor.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  9. #9
    Join Date
    May 2002
    Location
    MEDIA PA
    Posts
    1,381

    Hot water

    tank is most likly air bound . I should havevalves for bleeding . If you know how to purge the system do it . If you dont call a heating contractor in .

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