How to Tell What Size Copper Pipe I Have

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Measuring piping size can be a little disruptive at kickoff, simply anyone can larn how to do it. To observe the right size, first effigy out if yous demand to measure out the exterior or inside diameter, then measure out it with a ruler or tape mensurate. So you lot'll need convert the measurement to the "nominal" pipe size, or what that pipe volition be chosen in the store. Measuring pipe size is an of import skill to accept under your chugalug for your plumbing and edifice projects.

1. i

   Determine if your pipe has "male" or "female" threads or no threads. Threads are the little grooves on the ends of some pipes that help them fit together. Male threads are on the exterior of the pipe, whereas female threads are on the inside.^[1]

2. 2

   Find the exterior bore if the pipe has male threads or no threads. The outside bore is from outside edge to outside edge across the pipe. To find it, measure around the circumference of the pipage with flexible measuring tape. Split the circumference by pi, or about three.14159.

   • For example, if the circumference is 12.57 inches (319 mm), you would carve up by pi, and get an outside diameter of about 4 inches (100 mm).
   • Utilize cord to measure if you don't have measuring record. Mark the indicate on the cord where it wraps around the circumference. Then remove the string, measure it against a ruler, and divide that length by pi.

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3. 3

   Measure the inside diameter if the piping has female threads. That is the distance across the middle of the pipe, non including the thickness of the pipe walls. Use a ruler or a caliper and measure at the end of the pipe, where there is a cross department.^{[two] [3]}

   • Remember not to measure out from the outside edges, just rather from inside edge to within edge.

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1. 1

   Catechumen your diameter to nominal size if its smaller than fourteen inches (360 mm). If its 14 inches (360 mm) or more, you don't need to convert it, because the diameter will equal the nominal bore already.^[4]

2. 2

   Find out if you lot need to convert to NPS or DN. Convert to Nominal Pipe Size (NPS) if y'all are in Northward America, or Diameter Nominal (DN) if you are using the metric organization.

   • If you are unsure, information technology could help to go to the website of a shop in your country that sells pipe. If they mark pipe with inches, then you need the NPS system.

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Add New Question

• Question

  How do I know what size copper pipe I have?

  

  David Balkan
  Professional person Plumber & CEO of Balkan Sewer & Water Master

  David Balkan is a Professional Plumber, CEO of Balkan Sewer and Water Chief Service, and President of Balkan Sewer and Drain Cleaning. As a hands-on possessor of these companies for over twoscore years, David is knowledgeable virtually h2o service lines, sewers, and drain line issues. David is a Committee Chairman of the Principal Plumbers Council and has saturday on the Executive Committee of the Sub Surface Plumbers Association of New York for over 30 years. His noesis and solution-oriented approach contributed to Balkan Sewer and Water Main Service being the largest and most trusted service in New York Urban center and the recipient of the 2017 Angie's Listing Super Service Award.

  

  Professional person Plumber & CEO of Balkan Sewer & Water Main

  Expert Answer

  Measure out the outer diameter of your pipe with a caliper. Then, check online for a piping sizing chart. Compare the caliper measurement you collected with the sizing chart, and y'all'll know exactly which size y'all're working with.

• Question

  What are standard piping sizes?

  

  David Balkan
  Professional Plumber & CEO of Balkan Sewer & H2o Main

  David Balkan is a Professional Plumber, CEO of Balkan Sewer and Water Master Service, and President of Balkan Sewer and Bleed Cleaning. As a hands-on owner of these companies for over 40 years, David is knowledgeable about water service lines, sewers, and drain line issues. David is a Committee Chairman of the Primary Plumbers Council and has sat on the Executive Commission of the Sub Surface Plumbers Association of New York for over 30 years. His cognition and solution-oriented approach contributed to Balkan Sewer and H2o Principal Service being the largest and most trusted service in New York City and the recipient of the 2017 Angie's List Super Service Award.

  

  Professional Plumber & CEO of Balkan Sewer & H2o Main

  Skilful Answer

  Information technology depends on the blazon of pipage you're working with. Search online for a pipe sizing chart, which tin can point you in the correct direction.

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• Tables can besides help yous detect out the "schedule" of your pipe, which is related to the wall thickness.

• If you take tubing, instead of pipe, y'all don't demand to convert to nominal diameter. Tubing is named based on the outside diameter.

• If you take PEX, Cross-Linked Polyethylene Tubing, the nominal diameter is equivalent to the internal diameter. ^[half-dozen]

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