1. David Becker, Jul 26, 2025

   #1

   

   David Becker New Member

   Joined:

   May 4, 2025

   Messages:

   3

   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 Senior Member

   Joined:

   Feb 29, 2008

   Messages:

   8,750

   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.

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