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  2. Air lock - Wikipedia

    en.wikipedia.org/wiki/Air_lock

    'S' trap inlet to drain [further explanation needed]. The air lock phenomenon can be used in a number of useful ways. An 'S' trap (a pipe that descends from a reservoir, then curves back up, then down again) allows liquid to flow from top to bottom unhindered, and gas cannot flow through the trap unless it has enough extra pressure to overcome the liquid head of the trap.

  3. Airlock - Wikipedia

    en.wikipedia.org/wiki/Airlock

    Civil engineering projects that use air pressure to keep water and mud out of the workplace use an airlock to transfer personnel, equipment, and materials between the external normabaric environment and the pressurized workplace in a caisson or sealed tunnel. The airlock may need to be large enough to accommodate a whole working shift at the ...

  4. How to keep your pipes from freezing during cold temperatures ...

    www.aol.com/keep-pipes-freezing-during-cold...

    Let just one faucet in your home drip. Allow the water to drip about the width of a spaghetti noodle. Palacios said typically, you should choose the faucet furthest from your water meter. Cover ...

  5. Trap (plumbing) - Wikipedia

    en.wikipedia.org/wiki/Trap_(plumbing)

    Trap with copper drain pipe at underside of firestop packing in two-hour fire-resistance rated concrete floor slab Typical P-trap. Maintaining the water seal is critical to trap operation; traps might dry out, and poor venting can suction or blow water out of the traps. This is usually avoided by venting the drain pipes downstream of the trap ...

  6. Why is it important to remove lead from water pipes? A ... - AOL

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  7. EPA proposes requirement to remove lead pipes from US water ...

    www.aol.com/news/epa-proposes-requirement-remove...

    The US Environmental Protection Agency has proposed a rule that would require water systems across the country to replace lead service lines within 10 years, aiming to accelerate progress toward ...

  8. 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.

  9. Lead service line - Wikipedia

    en.wikipedia.org/wiki/Lead_service_line

    The first part is the pipe that connects the water main to the curb stop which is a stop valve that is located around the street curb or the property line. That first section is called communication pipe. The second part is the pipe that connects the curb stop to the building inlet or a water meter. This part is called supply pipe. Depending on ...

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