The FC56150 Rubber Coupling Flexible Connector - 1.5" x 1.5" is a flexible pipe coupling designed for joining non-pressure drain, waste, and vent (DWV) piping systems. The most common and widely recognized equivalent/alternative product is the Fernco 1056-150. 
Key Features and Specifications
Size: 1.5 inches x 1.5 inches (nominal). The internal diameter is designed to fit pipe O.D.s (outside diameters) generally between 1.65" and 2.00".
Material: Made from durable, elastomeric polyvinyl chloride (PVC) with corrosion-resistant 300 series stainless steel clamps.
Pipe Compatibility: Suitable for connecting a variety of pipe materials including plastic (PVC, ABS, CPVC), cast iron, copper, steel, or lead pipes.
Applications: Primarily used for sewer, drain, waste, and vent piping applications. It is rated for use both above and below ground and is not intended for pressurized plumbing systems.
Pressure Rating: Maximum test pressure of 4.3 PSI (29.6 KPA).
Temperature Range: Suitable for continuous temperatures from -30°F to 140°F (-30ºC to 60ºC).
Resistance: The coupling is leak-proof, root-proof, and resistant to chemicals, UV rays, fungus growth, and sewer gases.
Installation: Easy to install using a screwdriver or torque wrench (requires 60 inch lbs of torque); no special tools, primer, or glue are needed.
Certifications: Conforms to industry standards such as ASTM C1173, ASTM D5926, and CSA B602, and is UPC approved.