PVC fittings have a wide range of applications in the aquarium hobby, offering many benefits that make them an ideal choice for the construction and maintenance of aquarium systems. PVC, or polyvinyl chloride, is a widely used plastic that is strong, chemical resistant and durable. PVC trunk connectors can be used to connect an external filter through holes in the bottom glass of an aqaurium. This eliminates the need to run tubing around the outside of the aquarium. Stopcocks make it easy to disconnect the filter from the aquarium without spilling water.
