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Please explain what this is and does

Discussion in 'Technical Discussion' started by David Becker, Jul 26, 2025.

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  1. David Becker, Jul 26, 2025
    #1
    David Becker

    David Becker New Member

    Joined:
    May 4, 2025
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    Location:
    San Francisco
    the black hoses cone from thru-hull valves and create an airgap in the stainless steel loops at each top.
    what are these for? How do they work?

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  2. Pascal, Jul 26, 2025
    #2
    Pascal

    Pascal Senior Member

    Joined:
    Feb 29, 2008
    Messages:
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    Location:
    Miami, FL
    Symphon break. When the pump stops whatever water would drain out and symphon more water will suck air from the top.
    K1W1 likes this.