Preheat oven to 350°F (180°C). Butter a 9x5x3-inch loaf pan or line it with parchment paper.
In a medium bowl, whisk flour, salt, baking soda, ginger, cinnamon, and nutmeg.
In another bowl, mix the pumpkin purée, melted butter, sugar, molasses, 1 Tbsp. of the candied ginger, eggs, and water.
Combine the wet and dry ingredients, mixing gently just until combined.
Scrape the batter into the prepared pan and sprinkle top with remaining 2 Tbsp. of candied ginger.
Bake for about an hour, until a skewer poked into the center of the loaf comes out clean.
Remove from oven and let cool in the pan for about 10 minutes then run a knife around the edge of the loaf to loosen. Invert the pan to remove the loaf. Cool completely before cutting