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Pre-made Backing Block for 3/4" & 1" Seacocks
Super handy and easy to install. Will not rot like wood and provides adequate support for through bolted seacocks.
- Fits 3/4" & 1" Groco Seacocks or Flanged Adapters
- Threaded inserts into the hull side of the backing block for holes that match the seacock flange
- Rigid 1/2" thickness provides secure installation
- Will not swell, rot or absorb moisture