Fresh Water Fill Port

Published date: December 3, 2011
  • Boat Type: Boat Type

One thing about a purchasing a used MacGregor is that more than likely the boat will have a hole or two in it that you just need to fill. Sometimes this means just grinding it down and filing it with some fiberglass and gel coat, or in my case a little light body filler plus paint. But sometimes you get lucky and can re-use the hole for something new. Such was the case for the location of my fresh water tank filler, which placed in the aft port outer quarter panel of the upper hull, where an old marine com antenna was mounted.

The fresh water filler neck is used to conveniently service the 200 Liter Pastimo flexible water tank I installed beneath the aft bunk (See my mod post
/modt/index.php?view=1478). The location between the tank and the filler neck is easy to get to after you open up the aft floatation foam area between the aft berth ceiling and the outer hull (See my mod post An inch and half tube is used to fill and vent the tank when serving and is easy to install after the tank is secured and filler neck is sealed and screwed into place.

Whitecap makes a line of deck filler necks which are clearly labeled, this one is marked WATER in blue, and not outrageously priced. You could just drill a round hole in the fiberglass and screw it in. But somehow I convinced myself it would look so much better if the filler neck was FLUSH mounted. The finished product does indeed look better flush mounted; however I'm not sure you can tell that from the photographs.

In order to get a flush mount, the outer hull needs to be built up around the filler neck. After completing the basic mounting, I wrapped the filler neck with release tape, then screwed it in place surrounded with a mix of resin and cotton flox. After a full cure, I beat the filler neck back out with a small rivet gun and removed the tape. The epoxied area was coated with a light weight filler for about 18 inches to fair in the raised area, then sculpted, sanded, and primered awaiting final paint on the boat.

The boat was finish painted and the shiny filler next was installed. I am really pleased with results.


Published by: u12fly

Model Year: 2006
Photo Caption: The filler neck is coated with release tape and buried in epoxy resin - flox

Steps involved to build up surface: resin, filler, shap/sand, prime, then paint

Finished fresh water filler port installed in the painted boat hull


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