Plumbing Materials Overview
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Questions and Answers

What is the primary material composition of lead pipe?

  • Lid of stainless steel
  • 99.7% pig lead (correct)
  • Vitrified clay
  • 100% copper

    • Which type of copper tube is recommended for light domestic water lines?

  • Type DWV (yellow)
  • Type M (red) (correct)
  • Type L (blue)
  • Type K (green)

    • What is the main characteristic of Cast Iron Soil Pipe (CISP)?

  • It is manufactured only in standard weight for building installations.
  • It is susceptible to corrosion from alkaline substances.
  • It is widely specified for drainage installations due to its durability. (correct)
  • It is commonly used for underground installations due to its lightweight.

    • What is a significant drawback of using copper tubes for drainage systems?

    <p>They are prone to corrosive attack by ordinary sewage</p> Signup and view all the answers

    Why is Acid Resistant Cast Iron Pipe designed to be supported at every 1.50-meter interval?

    <p>It is brittle and may crack easily if not supported.</p> Signup and view all the answers

    Which pipe is best suited for underground work and resistant to most acids?

    <p>Vitrified clay pipe</p> Signup and view all the answers

    What materials make up Asbestos Cement Pipe?

    <p>Asbestos fiber and Portland cement.</p> Signup and view all the answers

    What is a limitation of Type DWV copper tubes?

    <p>They are made only in rigid form</p> Signup and view all the answers

    Which type of pipe is rarely used in modern plumbing due to health concerns?

    <p>Lead pipe</p> Signup and view all the answers

    What is a notable disadvantage of Galvanized Steel Pipe?

    <p>It can corrode easily when exposed to alkaline and acidic conditions.</p> Signup and view all the answers

    Which variety of Cast Iron Pipe is NOT mentioned?

    <p>Triple Hub Pipe</p> Signup and view all the answers

    What is a unique characteristic of seamless pipes in production?

    <p>They are formed by piercing a hot steel billet</p> Signup and view all the answers

    What material is used to make copper tubes, and what is their purity?

    <p>Almost pure copper at 99.9%</p> Signup and view all the answers

    What specific application is Acid Resistant Cast Iron Pipe primarily used for?

    <p>Discharging acid wastes in laboratories and industries.</p> Signup and view all the answers

    In which of the following circumstances is Asbestos Cement Pipe best utilized?

    <p>In concrete embedment situations due to its similar properties.</p> Signup and view all the answers

    What is the typical length range for Cast Iron Soil Pipe?

    <p>5' to 10'</p> Signup and view all the answers

    What is the primary purpose of a cap in pipe fitting?

    <p>To close the end of a pipe</p> Signup and view all the answers

    Which type of fitting is used to connect pipes that cannot be turned?

    <p>Union Patente</p> Signup and view all the answers

    What distinct characteristic does a bushing have in pipe fitting?

    <p>It has threads on both the inside and outside</p> Signup and view all the answers

    In pipe fitting terminology, what is an increaser used for?

    <p>To connect a pipe to one of a larger size</p> Signup and view all the answers

    What does a bend offset in piping achieve?

    <p>Brings one section of the pipe parallel to another</p> Signup and view all the answers

    What is the primary advantage of using brass pipes in plumbing?

    <p>They have a smooth interior surface.</p> Signup and view all the answers

    What characterizes thermoset plastic in pipe manufacture?

    <p>It remains permanently rigid after heating.</p> Signup and view all the answers

    Which type of pipe fitting is specifically used to change the direction of a drainage system?

    <p>Elbow</p> Signup and view all the answers

    What is a disadvantage of thermoplastic pipes?

    <p>Poor fire resistance</p> Signup and view all the answers

    What feature distinguishes a long sweep bend from a short sweep bend in plumbing?

    <p>The angle of curvature involved.</p> Signup and view all the answers

    What type of fitting provides a 180° change in direction?

    <p>Return Bend Elbow</p> Signup and view all the answers

    Which of the following is a key requirement of the Plumbing Code regarding piping?

    <p>Any change in direction must have a large radius of curvature.</p> Signup and view all the answers

    Which type of pipe is least resistant to damage from sunlight exposure?

    <p>Thermoplastic pipe</p> Signup and view all the answers

    What is the purpose of a combination wye branch fitting?

    <p>To combine a wye branch with a 1/8 bend for directional changes.</p> Signup and view all the answers

    In what scenario is a sanitary tee required according to code?

    <p>When flow characteristics are a major consideration.</p> Signup and view all the answers

    What distinguishes a sanitary cross tee from a standard cross fitting?

    <p>It channels flow from branch lines towards the main flow.</p> Signup and view all the answers

    What is a unique characteristic of a street tee?

    <p>It has external threads on one branch and internal threads on the other.</p> Signup and view all the answers

    What is the main function of an adapter in piping systems?

    <p>To connect different types of pipe materials.</p> Signup and view all the answers

    What describes a tapped tee?

    <p>It has a branch that is tapped to accept a threaded pipe.</p> Signup and view all the answers

    What is the primary feature of a nipple in piping?

    <p>It is a short length of pipe with external threads at each end.</p> Signup and view all the answers

    How does a coupling relate to a socket fitting?

    <p>A coupling has enlarged ends for strength, unlike a socket fitting.</p> Signup and view all the answers

    Study Notes

    Plumbing Materials Overview

    • Plumbing materials must be defect-free to ensure service efficiency and sanitation.
    • Pipe types vary in shape, size, and quality, affecting suitability for plumbing systems.

    Pipe Types

    • Cast Iron Soil Pipe (CISP)

      • Made from an alloy of carbon and silicon.
      • Available in standard (service) and extra heavy weights.
      • Commonly used in drainage; dimensions range from 50-150mm.
      • Prone to corrosion from acid; four varieties include Standard, Double Hub, Single Hub, and Hubless.

    • Acid Resistant Cast Iron Pipe

      • Alloy of cast iron and silicon resistant to chemical exposure.
      • Used in facilities discharging acid waste, requires support at 1.50-meter intervals.

    • Asbestos Cement Pipe

      • Composed of asbestos fibers and Portland cement.
      • Utilized for soil, waste, ventilation pipes, and downspouts due to its embedment compatibility.

    • Galvanized Steel Pipe

      • Mild steel that is welded; susceptible to corrosion from alkaline and acidic water.
      • Two types: welded (flat strip drawn through die) and seamless (pierced cylindrical billet).

    • Vitrified Clay Pipe

      • Common in storm and sanitary sewer systems.
      • Made from clay and water, resistant to most acids, suitable for underground applications.

    • Lead Pipe

      • Comprises 99.7% pig lead, limited modern use due to health hazards.
      • Used for connections in specific applications like laboratory corrosive wastes.

    • Copper Tubes

      • Seamless tubes for hot/cold water supply and drainage systems, made from 99.9% pure copper.
      • Available in various types (K, L, M, DWV, ACR) with different applications and structural characteristics.

    • Brass Pipes

      • Alloy of 85% copper and 15% zinc, known for high cost and durability.
      • Resistant to acids with both screwed and soldered joints.

    • Plastic or Synthetic Pipe

      • Two types: Thermoset (rigid, resistant to solvents) and Thermoplastic (softened by heat).
      • Advantages include chemical resistance and low initial cost; disadvantages include poor stability and fire resistance.

    Pipe Fittings

    • Devices connecting pipes or changing their direction, designed to prevent solid accumulation for effective flow.

    • Bends and Elbows

      • Bends change direction with 90° angles available in short or long sweep varieties.
      • Return Bend Elbow provides a 180° turn.

    • Wye/Wye Branch

      • Connects branch pipes at a 45° angle.

    • Tee Fittings

      • Connects branch pipe at right angles; includes standard and sanitary tees designed for differing flow characteristics.

    • Couplings and Adapters

      • Coupling joins two pipes; adapter connects different materials (galvanized to plastic).

    • Tap, Cap, and Plug

      • Tap tees receive threaded fittings; caps close pipe ends; plugs are threaded and often square-headed.

    • Unions and Nipple Fittings

      • Union connects two non-rotating pipes; nipple joins fittings with various lengths and threading types.

    • Bushing, Reducer, and Increaser

      • Bushing connects pipes of different sizes; reducer decreases pipe diameter; increaser connects pipes of larger size.

    General Considerations

    • Ensure correct material selection based on application and environmental conditions.
    • Follow plumbing codes to maintain hydraulic flow and prevent blockages.

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    Related Documents

    Plumbing Materials PDF

    Description

    This quiz covers the essential aspects of various plumbing materials and pipe types. Understanding the characteristics and applications of pipes such as Cast Iron Soil Pipe, Acid Resistant Cast Iron Pipe, and others is crucial for effective plumbing maintenance. Test your knowledge about the specifications and suitability of different plumbing materials.

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