## Roof Drain Calculations

In order to size rain water leaders and gutters there are some simple calculations to follow. First, you must know the maximum 15 minute rainfall […]

Roof Drain Calculations Read More »

In order to size rain water leaders and gutters there are some simple calculations to follow. First, you must know the maximum 15 minute rainfall […]

Roof Drain Calculations Read More »

Applying the Rolling Offset Formula: A rolling offset in a plumbing system is when a pipe changes in both the horizontal and vertical planes. The

Rolling Offset Formula Read More »

Math unfortunately is part of being a plumber or any other skilled trade for that matter. Although we don’t tend to use many of these

Plumbing Math Formulas Read More »

Finding the expansion of pipe is relatively easy using the formula for “linear expansion”. There are many reasons beside trade school to know these calculations

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The specific gravity of a substance is a comparison between the mass or density of a substance as compared to an equal volume of water.

Specific Gravity Formula Read More »

An important plumbing concept is understanding the ratio between pipe size and volume output. A common question that can be found on plumbing exams is:

Ratio of Pipe Capacity Formula Read More »

Often when reading plans, surveys or calculating measurements we are left with decimal numbers and need to convert them to feet, inches and fractions of

How To Convert Decimals To Fractions Read More »

Area of a square / rectangle Area = length x width Area of a circle Area = diameter x diameter x .7854 Surface area of

Area Formulas for various objects Read More »

Finding the volume / capacities of various objects is generally quite simple, just follow these formulas. Rectangular tanks Cylindrical tanks Elliptical tanks Spheres Frustum shaped

Finding The Volume Of Objects Read More »

Using Survey Equipment To Find Pipe Grade Although most residential plumbers will only need to know how to read a Philadelphia rod in order to

Finding Grade Using A Philadelphia Rod Read More »