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 MoreOnce 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 PlumbingSources:

- Q:
## How do you cut cast iron pipe?

A:To properly cut cast iron pipe, use a snap cutter, which cuts accurately without damaging the rest of the pipe. First, stabilize the pipe, and then mark a cut line. Finally, use the snap cutter to cut the pipe.

Full Answer >Filed Under: - Q:
## Why is my overflow pipe leaking?

A:

Full Answer >**The three most common causes of a leaking overflow pipe are increased water pressure, an overused washer or a faulty float valve.**It is important to fix a leaking overflow pipe immediately, as it can lead to structural damage to a house and mold formation.Filed Under: - Q:
## Where can you purchase culvert pipe for driveways?

A:

Full Answer >**Culvert pipe for driveways can be purchased at home improvement stores as well as specialty stores.**Culvert pipe is sometimes called corrugated drainage pipe, sluice pipe or flex pipe.Filed Under: - Q:
## How do you clean your plumbing vent pipe?

A:

Full Answer >**Cleaning a plumbing vent pipe involves spraying water in to the vent and using a plumbing auger to remove any blockage.**Unblocking the pipe requires someone to climb to the roof, since the vent opening is located there.Filed Under: