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    binski720's Avatar
    binski720 Posts: 2, Reputation: 1
    New Member
     
    #1

    Aug 4, 2008, 11:43 AM
    Over the last several months we have lost our hot water pressure in all of our showers and sinks. My neighbor said that he changed his coil in his boiler about 4 years ago because of the same problem. I know we have a hard water problem which I just bought a water softener which I am going to install this weekend. I have plumbed houses before but have never worked with a boiler system. Does anyone have any ideas before I replace the coils??

    From what he said, because of the hard water the calcium built up in the coil and restricted the flow. It makes sense but I've been reading about the expansion tank and some valves that would be easier to replace.

    Thanks for your advice!!

    Does anyone have any ideas?
    Thanks,
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
     
    #2

    Aug 11, 2008, 08:01 AM
    From what he said, because of the hard water the calcium built up in the coil and restricted the flow. It makes sense
    It sure sounds like the furnace coil should be replaced first.
    but I've been reading about the expansion tank and some valves that would be easier to replace.
    What about them? A expansion thank won't increase your volume/pressure and since you've lost pressure all over the entire house what valve would you change first?
    Start with the furnace coil and go from there. Good luck, Tom
    binski720's Avatar
    binski720 Posts: 2, Reputation: 1
    New Member
     
    #3

    Aug 25, 2008, 07:34 AM
    Here's what I did. I am not telling any one to do this but it worked great and for only $40.00. I cut the pipes leading to the boiler, The cold inlet and the hot water oulet and installed shut off valves. I then cut the lines and put two tee's with hose connections. I used a drill pump and pumped muriatic acid through the coil in the boiler and couldn't believe all the sediment that came out. This was a chance I took because someone said it would work and it did. You have to be verry careful when using this acid. I had a full face shield and checical gloves on when pumping it through the boiled. If anyone wants pictures of what I did let me know and I can send them to you.

    Hope this helps someone!!
    mbuttorf's Avatar
    mbuttorf Posts: 1, Reputation: 1
    New Member
     
    #4

    Aug 26, 2008, 05:36 PM
    Comment on binski720's post
    This is it!! It is the answer to hard water build up in boiler heat!!
    yourdeadmeat69's Avatar
    yourdeadmeat69 Posts: 1, Reputation: 1
    New Member
     
    #5

    Apr 30, 2013, 06:11 AM
    Muriatic acid dissolves the PIPE freeing the deposits. It weakens the structure of the pipe, and for my money, sounds extremely risky.

    Would you run muriatic acid through a vintage car engine to release the sludge by "dissolving" a part of the engine?

    I would think you have to be very thorough and very lucky to have this work.
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
     
    #6

    Apr 30, 2013, 07:08 AM
    Sorry yourdeadmeat, but you are misinformed... ;)

    Please read this article... should clear up the confusion:

    The Effects of Muriatic Acid & Copper | eHow.com

    Muriatic acid (i.e. hydrochloric acid) is a perfect acid for the application of cleaning out tankless coils... been doing it over 30 years and have NEVER had any problems.

    Mark

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