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    <div class="moz-cite-prefix">Glad it seemed to work for you. 
      Growing up, mom would pour a couple pots of boiling water down the
      kitchen drain every few weeks.  I can't say it was 100% effective
      since I remember several times having to help dad disassemble the
      plumbing to clean out the pipes on the driveway.  But I guess when
      done regularly it might help prevent large grease deposits from
      forming near the sink.<br>
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    <div class="moz-cite-prefix"><br>
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    <div class="moz-cite-prefix"><br>
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    <div class="moz-cite-prefix">On 12/12/20 5:03 PM, Jim Franklin
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:CC411ECA-10CB-48D6-A975-AF762B285E91@groupwbench.org">
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      I would have bet a case of beer the boiling water wouldn't work,
      because it would be too cool before it reached the grease attached
      to a giant cast iron tee, and also it wouldn't get splashed onto
      enough grease to melt it. However, a few gallons of hot sink water
      followed by a gallon of boiling water, all while plunging
      furiously, did absolutely nothing at first, but then a few hours
      later there was no gurgling from the tub and it's been silent for
      a few days. 
      <div class=""><br class="">
      </div>
      <div class="">I'll get some of that bacteria/enzyme stuff as
        preventative maintenance. </div>
      <div class=""><br class="">
      </div>
      <div class="">The scope sounds like a great idea but the only
        access I have is from the roof and it's about 12 feet from vent
        to to sink entry point. If there's a dry day I'll drop a rock on
        a string down there and see what happens. </div>
      <div class=""><br class="">
      </div>
      <div class="">Thanks all!</div>
      <div class=""><br class="">
      </div>
      <div class="">jim<br class="">
        <div><br class="">
          <blockquote type="cite" class="">
            <div class="">On Dec 7, 2020, at 8:53 AM, Jimmie Mayfield
              <<a href="mailto:mayfield+shoptalk@sackheads.org"
                class="" moz-do-not-send="true">mayfield+shoptalk@sackheads.org</a>>
              wrote:</div>
            <br class="Apple-interchange-newline">
            <div class=""><span style="caret-color: rgb(0, 0, 0);
                font-family: Helvetica; font-size: 14px; font-style:
                normal; font-variant-caps: normal; font-weight: normal;
                letter-spacing: normal; text-align: start; text-indent:
                0px; text-transform: none; white-space: normal;
                word-spacing: 0px; -webkit-text-stroke-width: 0px;
                text-decoration: none; float: none; display: inline
                !important;" class="">If it's grease build-up, you might
                try periodically pouring a gallon or two of boiling
                water down the kitchen sink.</span><br
                style="caret-color: rgb(0, 0, 0); font-family:
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              <br style="caret-color: rgb(0, 0, 0); font-family:
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              <span style="caret-color: rgb(0, 0, 0); font-family:
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                font-variant-caps: normal; font-weight: normal;
                letter-spacing: normal; text-align: start; text-indent:
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                word-spacing: 0px; -webkit-text-stroke-width: 0px;
                text-decoration: none; float: none; display: inline
                !important;" class="">You might consider buying one of
                those cheap USB endoscopes from Amazon or Ebay.  I
                bought one for about $15 on Prime Day a couple years
                ago.  The camera quality is pretty bad but they're
                pretty long...mine is about 15 feet.  You could snake it
                down your kitchen drain clean-out and see for yourself
                what's going on inside your pipes.</span><br
                style="caret-color: rgb(0, 0, 0); font-family:
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              <span style="caret-color: rgb(0, 0, 0); font-family:
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                !important;" class="">On 12/7/20 08:25, Jim Franklin
                wrote:</span><br style="caret-color: rgb(0, 0, 0);
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              <blockquote type="cite" style="font-family: Helvetica;
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                class="">Maybe some of you have an innovative
                solution...<br class="">
                <br class="">
                My house has a single cast iron soil stack that does
                both drain and vent. When I flush the toilet, it sucks
                air from the tub drain. The toilet and tub enter the
                stack separately, but at the same height, using an oddly
                specific T with a 4" toilet and a 2" tub inlet about 45
                degrees apart. The tub does not have its own vent. 2
                years ago I had a plumber snake the vent from the roof,
                he found "stuff", and it was fixed. Last week it started
                again.<br class="">
                <br class="">
                My kitchen sink T's into the stack at knee height, so
                it's the highest item on the stack. My thought is,
                because it's a straight T, not a sanitary T, stuff from
                the sink is solidifying inside the T when the flow hits
                the back of the T, and eventually forming a cap of
                "stuff" just above the T entry, sealing off any venting.
                I can't tell if the sink is also being used as the
                toilet's vent because there are too many walls in the
                way to hear what's happening.<br class="">
                <br class="">
                My other thought is that the "stuff" is growing like a
                mold, and sealing it off. Does stuff grow in drains?<br
                  class="">
                <br class="">
                Any thoughts on what it might be, and how to prevent it?
                I rarely put oils down the drain, and when I do they are
                cold and mixed with Dawn to emulsify it. There isn't
                enough canopy for leaves or squirrels to get in the roof
                vent.<br class="">
                <br class="">
                thanks,<br class="">
                jim<br class="">
                _______________________________________________<br
                  class="">
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href="http://autox.team.net/mailman/options/shop-talk/jamesf@groupwbench.org"
                style="font-family: Helvetica; font-size: 14px;
                font-style: normal; font-variant-caps: normal;
                font-weight: normal; letter-spacing: normal; orphans:
                auto; text-align: start; text-indent: 0px;
                text-transform: none; white-space: normal; widows: auto;
                word-spacing: 0px; -webkit-text-size-adjust: auto;
                -webkit-text-stroke-width: 0px;" class=""
                moz-do-not-send="true">http://autox.team.net/mailman/options/shop-talk/jamesf@groupwbench.org</a></div>
          </blockquote>
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