Groco THT530 Thru Hull Installation Tool , Sizes 1/2″ through 3″

Enables Installations GROCO thru-hull fittings by a single installer.

• Slide the thru-hull fitting, flanged end first, over the tool. (It will stop at the proper step.) Tie a length of monofilament to the eye and place it into the already-cut hole in the hull of the boat.
• Apply caulking to the flange of the fitting, and pull the fitting through the hole and against the hull from inside the boat.
• Thread the mono-filament through the locknut or seacock.
• With the fitting pulled firmly against the hull the locknut or the seacock may be screwed onto the fitting.