FRP Manholes are a confined space aperture, such as a shaft, utility vault, or big vessel. They are frequently utilised to provide access to an underground public service, allowing for inspection, maintenance, and system improvements. They keep unauthorised people who don't have the right credentials out of the drainage system. FRP Manholes act as a temporary water storage facility, enabling surplus liquid to accumulate in the drainage system rather than flooding out. They are very safe and economical to use.