Extended Mushroom Thru-Hull

Industry Leader
Helping Boaters
Helping Boaters Since 1979
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Compatible with practically any thru hull piping or valve, these mushroom style Naval Bronze Extended Thru-Hull fitting are extremely strong, simple to assemble, and offer longer neck lengths than standard thru-hulls.

Key Features:

  • Naval bronze construction for increased durability in the harsh marine environment
  • Ideal for use with various hull thicknesses due to extra long neck lengths.
  • Approximately 2” longer neck than standard thru-hulls
  • Compatible with virtually any piping or valve Thru-Hulls without the need for adapter connections
  • Machined sealant groove at the back of the flange prevents leakage.
  • Includes flanged jam nut
  • Internal wrench lugs to aid in nut tightening during installation.
  • Available in (2) different sizes: 3/4" and 1"
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