Hard water calcium clog under slab

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by zver11, Apr 18, 2021.

  1. zver11

    zver11 New Member

    Joined:
    Jan 7, 2013
    Location:
    Philadelphia pa
    Cleaned out long horizontal run PVC drain pipe from kitchen heavily clogged with calcium. Used vinegar to soften and then cut pipe and jetted from low end. Now have calcium clog after vertical stack in 4" pipe under slab. Location approx 10' after vertical based on basement bathroom fixture flow. Used 30% vinegar fed through shower pan drain near clog and broke through. Problem is that after breakthrough, have limited size passage and gravity will mean only have small diameter passage. What is best way to clean pipe for more of the diameter to be open(or preferably get rid of all the calcium buildup)? Would think a foaming material would be best, but none of the foaming pipe clog products mention calcium clogs.
     
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