Water softener flushing question

Discussion in 'Water Softener Forum, Questions and Answers' started by ajcrm125, May 23, 2018.

  1. ajcrm125

    ajcrm125 New Member

    Oct 31, 2017
    Western MA
    I'm looking to install a water softener for the home and had a quick question about where to flush the system. I currently have a corrugated pipe that runs outside my entire foundation (below the frost line) of which all my drain spouts are connected to. This pipe goes to daylight.

    My plan was to just evacuate the filter into this existing pipe (run a line through the foundation etc). Any concerns about mineral buildup etc that might cause issues in the long run?

  2. Reach4

    Reach4 Well-Known Member

    Sep 25, 2013
    Build-up should not be a problem. However there will be some salt in the drain water. So it is not good for the plants at the outlet.
    Last edited: May 23, 2018
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  4. Matt Peiris

    Matt Peiris New Member

    Jun 10, 2018
    Long Beach,CA
    Mineral buildup is not much of a problem as documented below.

    "A study conducted at the University of Wisconsin introduced the backwash brine only to the soil dispersal component, not to the septic tank. The report suggests that additional research is needed to evaluate the effects of backwash brine on septic tank flora and fauna. The report is also inconclusive as to whether or not water softener backwash brine is harmful to septic systems. Additionally, these studies were performed nearly three decades ago when the required levels of treatment were not as restrictive as they are today"
    Source: http://www.nesc.wvu.edu/smart/pdf/sourcewater/SFQ_FW07_backwash.pdf

    However, install an airgap on the drain to prevent cross-connections.
  5. ditttohead

    ditttohead Water systems designer, R&D

    Jan 9, 2012
    Water systems designer, R&D, Technical Director
    Ontario California
    Hmmm, actually... follow local codes. If draining to the ground is allowed ie: French drain style, then go for it. Obviously you should avoid draining water softener waste to an irrigated area as the high amount of sodium, chloride will cause problems with SAR numbers. Assuming it is allowed, draining to a non critical area will be fine and it will not affect the drain pipe at all.
    Matt Peiris likes this.
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