Groco Backing Blocks #BB-4

Sale price $75.21 Regular price $82.49

  • Made in the USA.
  • 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.
  • Fits Seacock sizes: 3000, Diameter: 9.5", Insert Threads: 3/8"-16

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