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GROCO Backing Block f/ 3/ 4" & 1" Seacocks

GROCO Backing Block f/ 3/ 4" & 1" Seacocks

Regular price $57.79
Regular price Sale price $57.79
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Backing Block for 3/4" & 1" Seacocks


  • Each size fits multiple seacock sizes
  • Press threaded brass inserts into the hull side of the backing block into the holes that match the seacock flange
  • Rigid 1/2" thickness provides secure installation but is flexible enough to conform to minor hull curvature
  • Will not swell or absorb moisture
  • Made from an environmentally friendly PVC foam specially formulated for marine applications

Manufacturer Part Numbers: BB-1


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