Q:

How do you calculate pipe offset?

A:

Quick Answer

A pipe offset is calculated when a pipe is altered in both the vertical and horizontal planes of a piping system. This type of occurrence is known as a "rolling offset." Following Pythagoras' theorem, the first number, or true offset, is calculated by taking the offset squared and adding the rise squared to obtain the true offset squared. Take the square root of the answer to obtain the offset.

 Know More

Full Answer

Once the true offset is known, the pipe fitter can utilize a table to find out the setback and diagonal center. Most fitting constants are 45 degrees in the plumbing trade. If the fitting angle is 60 degrees, the diagonal for the pipe is equal to the true offset times 1.155. If the fitting angle is 45 degrees, the true offset is multiplied by 1.414 to obtain the diagonal. For any fitting angle that is 22.5 degrees, the true offset is multiplied by 2.613 to get the answer for the diagonal.

The setback for fitting a pipe equals the true offset multiplied by 0.577 for a fitting angle of 60 degrees. The true offset multiplied by 1.000 equals the setback for a 45-degree fitting angle. Multiply the true offset by 2.414 for the setback for a 22.5-degree fitting angle. Using the above calculations, the true offset for a 45-degree fitting is 14.42 inches and the same number for the setback.

Learn more about Plumbing

Related Questions

  • Q:

    What are the causes of brown, cloudy well water?

    A:

    The causes for brown and cloudy water may include rust in the piping, other iron-related problems, surface infiltration and well-structure problems. A proper diagnosis requires testing the water at a lab, which should be done before a plumber is called.

    Full Answer >
    Filed Under:
  • Q:

    How do I install a tumble dryer?

    A:

    Installing a tumble dryer requires pipe wrap tape suitable for gas connections, a stainless steel connector, flexible gas supply pipe, dishwashing liquid for gas dryers, 3/4-inch sheet metal screws, duct tape, a level, and straight and elbow metal duct piping. With one small exception, the procedure for installing both gas and electric dryers is the same. Always check the machine's owner manual for specific installation instructions.

    Full Answer >
    Filed Under:
  • Q:

    What are some sink drain parts?

    A:

    A kitchen sink drain assembly includes a strainer, strainer basket, rubber gasket, washers, lock nuts, housing, slip nuts, tailpiece, trap adapter, couplers, pipe and a trap. A bathroom drain assembly includes a stopper, flange, drain body, tailpiece, nuts, gaskets and a lift-rod assembly to operate the stopper.

    Full Answer >
    Filed Under:
  • Q:

    What is the difference between CPVC and PVC pipe?

    A:

    CPVC pipe differs from PVC pipe in that it withstands a wider degree of temperatures and contains more chlorine. PVC pipes can handle temperatures up to 140 degrees Fahrenheit according to ASTM standards. CPVC pipes can take temperatures up to 190 degrees Fahrenheit.

    Full Answer >
    Filed Under:

Explore