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  • Page 70 of 70 FirstFirst ... 6067686970
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    Thread: Birdman's Sand/Gravel Filter

    1. #1381
      kimini is offline Senior Member
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      Update:

      When I was assembling the SG filters last summer, I asked Birdman whether I should retain the metal grid insert in the bottom shower drain fitting. "Yes" was the answer, so I left it in, wondering slightly why, but knowing better than to question his advice.

      So the SG filters have been running about seven months now and are cleaned once a week. After each cleaning, the flow is always better, but over the months, total flow seems to be gradually dropping off and isn't restored to full flow even after cleaning. Yesterday I remembered that I'd plumbed in drain valves and never once used them, figuring the skimmer catches all the sizable stuff. Still, I got curious and opened the valves and let the filters drain 4-6". I guess I shouldn't have been surprised, but flow suddenly returned to like-new. Apparently enough stuff gets through the skimmer bucket that it ended up blocking the bottom inlet/drain. I suspect the reason Birdman wants the shower drain grid left in place is because it's far easier to remove a blockage there than if it had all made its way into the filter assembly and plugged up the bottom layer of rocks.

      Summed up, if your SG filters are slowing down, try draining them a few inches and see what comes out!

    2. #1382
      icu2's Avatar
      icu2 is online now Administrator ~ WWKC Treasurer
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      Interesting... I don't know why the screen would be left on either. On all I've DIY built I take out the screens but I also
      have a second shower drain installed in addition to the input so I can essentially do the same and flush out the bottom.
      I do it each time I clean them and always get a big rush of fine black stuff before it runs clear.

      So your "drain valves" are on the s/g filter inputs before the shower drain (bulkhead) fitting? I'm not sure how many
      others put those in or maybe it's in the instructions that Steve provides?
      --Steve
      Find more about Weather in Poulsbo, WA

      "It is far better to be alone, than to be in bad company." --George Washington

    3. #1383
      kimini is offline Senior Member
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      Correct, it Tee's off the inlet pipe.

    4. #1384
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      birdman is offline DIY Savant
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      I have no control over how people follow my instructions so leaving the screen on is kind of like insurance for me. The 1st layer of rocks needs to be big enough as to not fall through the dog kennel floor grating. The screen will prevent rocks getting into the inlet if any smaller rocks did fall through the grating.
      BUT
      If adding a TEE to the inlet so it can also be a drain then it would be better to not use the screen.

    5. #1385
      guardianx9 is offline Member
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      where do u buy the 1 1/4 inch 5 way t.. i tried looking at the homedepot website cant find..
      Last edited by guardianx9; 5 Days Ago at 02:20 PM.

    6. #1386
      gbp1s is offline Senior Member
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      Quote Originally Posted by guardianx9 View Post
      where do u buy the 1 1/4 inch 5 way t.. i tried looking at the homedepot website cant find..
      https://www.amazon.com/LASCO-20-7012...%2F4+5+way+pvc

    7. #1387
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    8. #1388
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      Home Depot Model # F1145WC-WH-4 11/4" 5 way pvc fitting

    9. #1389
      BWG is online now Senior Member
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      Over the years many have devised simple air manifolds that didn't use 5 ways or the bell less conduit 90s. Neither are stocked locally for me. Just use common Ts, 4 ways and 90s that are stocked locally and you can still build an efficient manifold.

    10. #1390
      Pond,James_Pond's Avatar
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      Ditto. The one I built looked more like an old school TV antenna. More like parallel spokes coming off a main center branch.

      steve

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