Indiana Seal, a GPK Products, Inc. company, has been manufacturing flexible PVC pipe couplings in the United States since 1981. They offer a full line of flexible pipe couplings in Fargo, North Dakota, capable of connecting various types of pipes such as clay, cast iron, ductile iron, concrete, and PVC. Their products range in sizes from 1 ¼ inches to 42 inches, with the ability to produce custom couplings of any dimension. Indiana Seal's PVC couplings are designed to withstand hazards like sewer gases, chemicals, and soil conditions, ensuring system integrity. They focus on producing high-quality materials and providing exceptional customer service while staying innovative in product development.