Josam is a trusted manufacturer of commercial drainage solutions designed for reliable performance in demanding environments. Their products are engineered to support effective water management across a wide range of building applications, with a strong reputation for quality and consistency in commercial construction.


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Josam 21504 - Poly Dome
Outside diameter 13"
Price: $79.55
Availability: In Stock
Josam Company Item #: 316-029273 -

    The Josam 21504 Poly Dome is manufactured from durable black polypropylene and fits the Josam 21500-series roof drains. It features a 13-inch outside diameter and a height of 4½ inches. This component helps prevent debris entry while maintaining full drainage capacity. Key Features Material: polypropylene Outside diameter: 13 inches Height: 4½ inches Color: black Designed to fit Josam 21500-series large sump roof drains ...

    Josam 21504-22 - Cast Iron Dome
    Outside diameter 13"
    Price: $159.95
    Availability: In Stock
    Josam Company Item #: 316-029279F -

      The Josam 21504-22 Cast Iron Dome is constructed from cast iron in a green finish and is designed for use with the Josam 21500-series large sump roof drains. It has an outside diameter of 13 inches and a height of 4½ inches. The design covers the drain opening and allows water to flow while helping to prevent large debris from entering. Key Features Material: cast iron Outside diameter: 13 inches Height: 4½ inches Color: green Designed to fit Josam 21500-series large sump roof drains ...

      Josam 414 - Cast Iron Drain Ring
      Outside diameter 13-3/4"
      Price: $369.95
      Availability: In Stock
      Josam Company Item #: 316-010350 -

        The Josam 414 Cast Iron Clamp Ring is manufactured from coated cast iron in a green finish and is designed for use with Josam 414 series roof drains. It features an outside diameter of 13-1/4 inches and bolt-to-bolt spacings of 10-1/2 inches (180°) and 7-1/2 inches. The ring secures roofing membrane or flashing to the drain body to maintain a watertight seal. Key Features Material: cast iron Color: green Outside diameter: 13-1/4 inches 180° bolt-to-bolt diameter: 10-1/2 inches Bolt-to-bolt...

        Josam 414 - High Hat Cast Iron Dome
        Outside diameter 8 1/4"
        Price: $305.95
        Availability: In Stock
        Josam Company Item #: 316-010320T -

          The Josam 414 High Hat Cast Iron Dome is constructed from cast iron with a green finish and is designed for compatibility with specific Josam roof drain bodies. It features an approximate outside diameter of 8-¼ inches and an approximate height of 11-½ inches. The dome design helps screen debris while maintaining drainage capacity in compatible roofing systems. Key Features Material: cast iron Outside diameter: approximately 8-¼ inches Height: approximately 11-½ inches Color: green High-hat...

          Josam 21504 - Cast Iron Ring
          Outside diameter 13-3/4"
          Price: $192.00
          Availability: In Stock
          Josam Company Item #: 316-029269F -

            The Josam 21504 Cast Iron Clamp Ring is made from durable cast iron with a protective green coating and is designed for use with Josam 21500-series roof drains. It features an outside diameter of 13-3/4 inches with bolt-to-bolt diameters of 10-3/4 inches (180°) and 7-1/2 inches. This ring securely fastens the roofing membrane or flashing to the drain body, ensuring a watertight seal. Key Features Material: cast iron Color: green Outside diameter: 13-3/4 inches 180° bolt-to-bolt diameter:...

            Josam 415 - Cast Iron Drain Ring
            Outside diameter 15-1/4"
            Price: $439.95
            Availability: In Stock
            Josam Company Item #: 316-415-RING -

              The Josam 415 Cast Iron Clamp Ring is constructed from coated cast iron in a green finish and is designed for use with select Josam roof drain bodies. It features an outside diameter of 14-3/4 inches, a 180° bolt-to-bolt diameter of 11-1/2 inches, and a bolt-to-bolt spacing of 8 inches. The ring securely clamps the roofing membrane or flashing to the drain body, creating a watertight seal. Key Features Material: cast iron Color: green Outside diameter: 14-3/4 inches 180° bolt-to-bolt diameter:...

              Josam 416 - Cast Iron Drain Ring
              Outside diameter 15-3/4"
              Price: $474.95
              Availability: In Stock
              Josam Company Item #: 316-010660 -

                The Josam 416 Cast Iron Clamp Ring is manufactured from cast iron and is designed for use with Josam 416 roof drains. It features an outside diameter of approximately 15-1/4 inches, a 180° bolt-to-bolt diameter of approximately 12-1/4 inches, and a bolt-to-bolt spacing of approximately 8-1/2 inches. The ring secures the roofing membrane or flashing to the drain body. Key Features Material: cast iron Outside diameter: approximately 15-1/4 inches 180° bolt-to-bolt diameter: approximately 12-1/4...

                Josam 22010 - Cast Iron Drain Ring
                Outside diameter 10-15/16"
                Price: $164.40
                Availability: In Stock
                Josam Company Item #: 316-011440 -

                  The Josam 22010 Cast Iron Clamp Ring is made of coated cast iron with a green finish and is designed for use with medium sump roof drains in the Josam 22010 series. It features an approximate outside diameter of 11 inches, a 9-inch 180° bolt-to-bolt diameter and 6½-inch bolt-to-bolt spacing. The ring secures the roofing membrane or flashing to the drain body to provide a watertight seal. Key Features Material: cast iron Color: green Outside diameter: approximately 11 inches 180° bolt-to-bolt...

                  Josam 22010 - Cast Iron Dome
                  Outside diameter 10-1/4"
                  Price: $129.95
                  Availability: In Stock
                  Josam Company Item #: 316-029680T -

                    The Josam 22010 Cast Iron Dome is built from green-coated cast iron in a beehive style and pairs with the Josam 22010 series medium sump roof drains. It has an outside diameter of 10½ inches and a height of 5¼ inches. The dome is designed to cover the drain opening while allowing water to flow through and intercept debris. Key Features Material: cast iron Outside diameter: 10½ inches Height: 5¼ inches Color: green Beehive style dome for medium sump roof drains ...

                    Josam 22080 - Cast Iron Dome
                    designed for smaller roofs, gutters, or valleys
                    Price: $95.95
                    Availability: In Stock
                    Josam Company Item #: 316-030697T -

                      The Josam 22080 Cast Iron Dome is made from coated cast iron in a beehive shape and pairs with the Josam 22080 series small-sump roof drains. It features an approximate outside diameter of 9 ¼ inches and a height of 5 ½ inches. The dome offers a free drainage area of about 37.6 square inches and is designed to intercept debris while maintaining effective water flow. Key Features Material: cast iron Outside diameter: approx. 9 ¼ inches Height: approx. 5 ½ inches Free drainage area: approx. 37.6...

                      Josam 22080 - Cast Iron Ring
                      Outside diameter 8-9/16"
                      Price: $55.55
                      Availability: In Stock
                      Josam Company Item #: 316-011420 -

                        The Josam 22080 Cast Iron Clamp Ring is constructed from coated cast iron in a green finish. It is designed for use with Josam 22080 series small-sump roof drains and features an approximate outside diameter of 9¼ inches with bolt-to-bolt spacing of about 7½ inches. The ring secures the roofing membrane or flashing to the drain body and provides a watertight interface. Key Features Material: cast iron Color: green Approximately 9¼″ outside diameter Approximately 7½″ bolt-to-bolt spacing...

                        Josam 22060 - Cast Iron Ring
                        Outside diameter 7-5/8"
                        Price: $199.95
                        Availability: In Stock
                        Josam Company Item #: 316-011230 -

                          The Josam 22060 Cast Iron Clamp Ring is constructed of cast iron with a protective green coating and is designed for use with the Josam 22060 series roof drains. It features an approximate outside diameter of 7 inches and a bolt-to-bolt spacing of approximately 5 inches. The ring secures roofing membrane or flashing to the drain body for a reliable seal. Key Features Material: cast iron Color: green Outside diameter: approximately 7 inches Bolt-to-bolt spacing: approximately 5 inches Designed...

                          Josam 4116 - Old Style Cast Iron Dome
                          Outside diameter 14-1/16"
                          Price: $759.95
                          Availability: In Stock
                          Josam Company Item #: 316-4116-DOME -

                            The Josam 4116 Old Style Cast Iron Dome is a cast iron, green-coated replacement dome for compatible Josam roof drains. The design provides a large free area to maintain flow while screening debris. Dimensions and performance values are taken directly from Josam’s official submittal for part 029350. Key Features Cast iron construction with green coating Old style dome design with 32 ribs and 32 slots Large free area rated at approximately 116 square inches Outside diameter approximately...

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                            Josam 414 - Cast Iron Drain Ring
                            Outside diameter 13-3/4"
                            Price: $369.95

                            The Josam 414 Cast Iron Clamp Ring is manufactured from coated cast iron in a green finish and is designed for use with Josam 414 series roof drains. It features an outside diameter of 13-1/4 inches and bolt-to-bolt spacings of 10-1/2 inches (180°) and 7-1/2 inches. The ring secures roofing membrane or flashing to the drain body to maintain a watertight seal. Key Features Material: cast iron Color: green Outside diameter: 13-1/4 inches 180° bolt-to-bolt diameter: 10-1/2 inches Bolt-to-bolt...

                            Josam 22010 - Cast Iron Drain Ring
                            Outside diameter 10-15/16"
                            Price: $164.40

                            The Josam 22010 Cast Iron Clamp Ring is made of coated cast iron with a green finish and is designed for use with medium sump roof drains in the Josam 22010 series. It features an approximate outside diameter of 11 inches, a 9-inch 180° bolt-to-bolt diameter and 6½-inch bolt-to-bolt spacing. The ring secures the roofing membrane or flashing to the drain body to provide a watertight seal. Key Features Material: cast iron Color: green Outside diameter: approximately 11 inches 180° bolt-to-bolt...

                            Josam 21504-22 - Cast Iron Dome
                            Outside diameter 13"
                            Price: $159.95

                            The Josam 21504-22 Cast Iron Dome is constructed from cast iron in a green finish and is designed for use with the Josam 21500-series large sump roof drains. It has an outside diameter of 13 inches and a height of 4½ inches. The design covers the drain opening and allows water to flow while helping to prevent large debris from entering. Key Features Material: cast iron Outside diameter: 13 inches Height: 4½ inches Color: green Designed to fit Josam 21500-series large sump roof drains ...

                            Josam 414 - High Hat Cast Iron Dome
                            Outside diameter 8 1/4"
                            Price: $305.95

                            The Josam 414 High Hat Cast Iron Dome is constructed from cast iron with a green finish and is designed for compatibility with specific Josam roof drain bodies. It features an approximate outside diameter of 8-¼ inches and an approximate height of 11-½ inches. The dome design helps screen debris while maintaining drainage capacity in compatible roofing systems. Key Features Material: cast iron Outside diameter: approximately 8-¼ inches Height: approximately 11-½ inches Color: green High-hat...

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