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  2. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    Manhole covers are often made out of cast iron, concrete or a combination of the two. This makes them inexpensive, strong, and heavy, usually weighing more than 113 kilograms (249 lb) [citation needed]. The weight helps to keep them in place when traffic passes over them, and makes it difficult for unauthorized people without suitable tools to ...

  3. Neenah Foundry - Wikipedia

    en.wikipedia.org/wiki/Neenah_Foundry

    Cast metal storm drain grate with Neenah Foundry marking. Neenah Foundry is a manufacturing company in the north central United States, based in Neenah, Wisconsin.The company manufactures cast iron manhole covers, gratings, and similar items for municipal and construction applications.

  4. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    A sewer pipe is normally at neutral air pressure compared to the surrounding atmosphere.When a column of waste water flows through a pipe, it compresses air ahead of it in the system, creating a positive pressure that must be released so it does not push back on the waste stream and downstream traps, slow drainage, and induce potential clogs.

  5. Sanitary manhole - Wikipedia

    en.wikipedia.org/wiki/Sanitary_manhole

    A sanitary manhole (sewer manhole, [1] sanitary sewer manhole [2] or sewer maintenance hole [3]) is a manhole that is used as an access point for maintenance and inspection of an underground sanitary sewer system. Sanitary manholes are sometimes used as vents to prevent the buildup of pressurized sewage gas. [4]

  6. EJ (company) - Wikipedia

    en.wikipedia.org/wiki/EJ_(company)

    EJ Group, formerly East Jordan Iron Works, is an American manufacturer of iron products, headquartered in East Jordan, Michigan.The company manufactures and distributes iron construction castings (Municipal castings), fabricated products, composite products, water distribution solutions, and other infrastructure access products for water, sewer, drainage, telecommunications, and utility ...

  7. How To Clean Enameled Cast Iron To Remove Stains And ... - AOL

    www.aol.com/clean-enameled-cast-iron-remove...

    When cleaning the enameled cast iron routinely after a cooking session or a recipe, remember a few important tips. First, avoid washing the enameled cast iron immediately after cooking in it.

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