Filter flow control question

Discussion in 'General Aquatic Talk' started by -dave, Jun 20, 2014.

  1. -dave
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    -dave Noob

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    Does anyone know how the flow-control dial/knob on some filters (mine - internal Dophin TF-500) work? Does the dial actually adjust the speed of the motor/pump or is is simply a valve that limits water intake or output flow?
     
  2. JP01
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    JP01 Moderator Staff Member

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    Reduces output otherwise the motor might cavitate
     
  3. wolf
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    wolf Valued Contributor

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    It's a valve
     
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