b'STORMWATERCATALOGSTORMWATER DRAINAGEStormwater drainage products are systems designed to mitigate damage and safety risks associated with normal and heavy stormwater accumulation events. These units perform multiple functions and operations from catchment points to containment for highly specialized units. Drainage products are an essential part of any stormwater project.ParkUSA offers a wide variety of stormwater drainage products, available in both standard and custom designed units. Precast concrete delivers strength, durability, and loading capacity needed for any application that requires these types of units. To complete any drainage system, a specifier, architect, or engineer needs a stormwater drainage unit that provides the solution to the corresponding project goal.MANHOLESBelow-ground wastewater and stormwater sewer piping require openings to allow for access, connection points, and change-in-direction points. A manhole, or manway, is used for these activities. The manhole is a belowground round or square structure made of precast concrete.Sewer piping connects near the bottom of the manhole structure. At the street level, an iron access cover (often referred to as a manhole cover) is placed to permit access.Sanitary Sewer Manholes: This manhole is used on sanitary sewer lines for the conveyance of sanitary sewage. The sanitary sewer manhole is typically 48 inches in diameter and varies in depth according the depth of the sanitary sewer. At the bottom of the manhole and at the pipe connections of the sewer, a channel (also called an invert) is formed so that the sewer flow is smooth and unimpeded. Since sanitary sewage can be corrosive, interior liners can be specified for the manhole interior.Stormwater Manholes: This manhole is used on stormwater sewer lines for the conveyance ofModel PCMrainwater. The storm sewer manhole is generally characterized by its larger size, which is dictatedby the sewer pipe connection sizes and orientation. Sizes of storm sewer manholes range from48 inches to 120 inches in diameter and vary in depth according to the depth of the storm sewer.APPLICATIONSA manhole is widely used as an access point for making connections, inspections, valve adjustments, or to perform maintenance on underground utility vaults. They are used in both stormwater or wastewater applications, being found in urban areas, streets, and sidewalks. ParkUSA also offers custom manhole units in order to be suitable for almost any application.Model PCMHIN124 INFO@PARKUSA.COM|888-611-7275|WWW.PARKUSA.COM'