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  2. Lead and Copper Rule - Wikipedia

    en.wikipedia.org/wiki/Lead_and_Copper_Rule

    EPA illustration of lead sources in residential buildings Infographic about lead in drinking water. The Lead and Copper Rule (LCR) is a United States federal regulation that limits the concentration of lead and copper allowed in public drinking water at the consumer's tap, as well as limiting the permissible amount of pipe corrosion occurring due to the water itself. [1]

  3. Knob-and-tube wiring - Wikipedia

    en.wikipedia.org/wiki/Knob-and-tube_wiring

    The conduit methods were known to be of better quality, but cost significantly more than K&T. [2] In 1909, flexible armored cable cost about twice as much as K&T, and conduit cost about three times the price of K&T. [6] Knob and tube wiring persisted since it allowed owners to wire a building for electricity at lower cost.

  4. 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 ...

  5. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    It must be installed in an easily accessible place for adjustment, replacement, and repair. A trap primer, a specialized valve, is usually connected to a clean-water supply in addition to a DWV system. [21] Because of the dual connection, it must be designed to resist the accidental backflow of contaminated water.

  6. Solenoid valve - Wikipedia

    en.wikipedia.org/wiki/Solenoid_valve

    A 3-way valve has 3 ports; it connects one port to either of the two other ports (typically a supply port and an exhaust port). The solenoid valve (small black box at the top of the photo) with input air line (small green tube) used to actuate a larger rack and pinion actuator (gray box) which controls the water pipe valve

  7. Change your AOL account to a free plan

    help.aol.com/articles/change-your-aol-account-to...

    Follow the steps below to learn how to change your AOL account to a free AOL account. 1. Go to AOL My Account. 2. Hover over My Services | click Subscriptions to access your account information.

  8. Energy price cap increase: How much will it cost you ... - AOL

    www.aol.com/news/energy-ofgem-price-cap-bills...

    For premium support please call: 800-290-4726 more ways to reach us

  9. Control valve - Wikipedia

    en.wikipedia.org/wiki/Control_valve

    A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. [1] This enables the direct control of flow rate and the consequential control of process quantities such as pressure , temperature , and liquid level.

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