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  • Results 1 to 13 of 13

    Thread: More issues with Pump-fed RDF versus Gravity-fed RDF?

    1. #1
      danfrancisco is offline Junior Member
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      More issues with Pump-fed RDF versus Gravity-fed RDF?

      I heard from a pond installer that pump-fed RDF tend to have more issues with gravity-fed RDF. I understand that an additional pump to fed the RDF is an additional thing that can go wrong. Other than that, are pump-fed RDF less reliable than gravity-fed RDF setups?

    2. #2
      jiawei468 is offline Member
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      Have done this for 1-2 years.
      Basically you need to do following thing:
      1. Don't let pumped water go straight into the RDF -- build a containing tank before the RDF instead.
      2. Maybe setting the water level sensor for RDF in the containing tank is better than setting it in the RDF.
      3. Be sure to add leaf basket in front of the pump. Other wise will get clogged easily.

    3. #3
      coolwon is online now Senior Member
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      I would have thought the pump fed RDF, would clog up quicker with the dirt broken down finer, by the pump fed impeller?

      Possibly creating more suspension in the pond water depending on the screen size.

      Gravity fed would be better if the installation allows it.
      Find more about Weather in Durban, ZA

    4. #4
      danfrancisco is offline Junior Member
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      Thanks jiawei468 and coolwon. Wouldn't a leaf basket in front of the pump feeding the rdf defeat the purpose of a self-cleaning drum?

      In my current setup, I have a leaf basket in front of the pump feeding to a bead filter. That leaf basket gets clogged quite frequently resulting in constant maintenance.

      My setup doesn't allow for a gravity-fed rdf configuration. If I still need to clean out a leaf basket frequently in a pump-fed setup, I am trying to decide if the a pump-fed rdf is really. Thoughts?

    5. #5
      NaturalK is online now Senior Member
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      I use my drum in pump fed and I just put it on a rinse timer instead.

    6. #6
      jiawei468 is offline Member
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      Quote Originally Posted by danfrancisco View Post
      Thanks jiawei468 and coolwon. Wouldn't a leaf basket in front of the pump feeding the rdf defeat the purpose of a self-cleaning drum?

      In my current setup, I have a leaf basket in front of the pump feeding to a bead filter. That leaf basket gets clogged quite frequently resulting in constant maintenance.

      My setup doesn't allow for a gravity-fed rdf configuration. If I still need to clean out a leaf basket frequently in a pump-fed setup, I am trying to decide if the a pump-fed rdf is really. Thoughts?

      There's no way you can get this.
      Some kind of "pre-filter" is always needed.
      You have following options:
      1. vacuum sieve liek zakki sieve
      2. huge leaf basket
      3. pond --> gravity fed pre-filter --> pump --> rdf. The pre-filter will catch most of the leaves or large debris.

      Other than above options, I don't think there's any way else based on current parts on market.

    7. #7
      danfrancisco is offline Junior Member
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      Thanks jiawei468. I like the idea of a zakki sieve. I might be able to skip the RDF and go with:

      pond --> zakki sieve --> pump --> bio filter

    8. #8
      janivan is online now Supporting Member
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      HI Danfrancisco

      I have made a RDF/Shower
      It is designed to be Pump feed

    9. #9
      icu2's Avatar
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      So you modified it to be pump fed or you made it? Who is Royal Koi?
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    10. #10
      janivan is online now Supporting Member
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      Hi Steve

      This was long time in the making.
      Trying to figure out how to have the pump feed RDF work.
      The RDF is on a timer. You can program how long the sprays go on for and how often the sprays is on.
      (My is set for every 40min to spay for 20 seconds)

    11. #11
      NaturalK is online now Senior Member
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      I believe King Koi is Cuong Pham on FB. So I'm guessing this might be a new product later

    12. #12
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      Putting a settlement tank in front of an RDF defects its purpose, to remove waste from the water column. The pond water will be going through a toilet bowl before reaching the RDF

      ....."Never argue with stupid people, they will drag you down to their level and then beat you with experience.".....Mark Twain

    13. #13
      BeyondKoi's Avatar
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      Here are some of my opinions about the Pros/Cons of Pump-fed vs Gravity-fed in this post:

      https://www.koiphen.com/forums/showt...-in-RDF-setups

      Thanks-


      Beyondkoi, LLC

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