This specification covers glass fiber-reinforced polyester manholes and wetwells for use primarily in sanitary and storm sewer applications. Manhole and wetwell cylinders, manway reducers, and connectors shall be produced from glass fiber-reinforced polyester resin with construction determined by the particular process of manufacture and configuration. The stiffness, soundness, chemical resistance, compressive strength, flexural strength, modulus, and hardness shall be tested to meet the requirements prescribed.