Fill a water bath canner with water and heat to a full boil. Heat another small pot of water to a boil and add new jar lids to sterilize; keep hot. While water bath is heating, put 1 clove sliced garlic, 1/4-teaspoon red pepper and 1 dill head into each of six sterilized pint canning jars. Fill jars with beans, packing them vertically and as tightly as possible. The beans should be about 1/2-inch from the top of the jars. Combine the 4 cups water, vinegar and pickling salt in a saucepan; bring to a boil. Fill the jars with this brine to 1/2-inch of the top, covering the beans. Quickly clean the rim of each jar if needed, cover with a hot lid and tighten the screw-on band until just tight. Process the jars in boiling water bath for 10 minutes. Let stand 2-4 weeks before eating.