## 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 …

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 …

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 …

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 …

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 …

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. …

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: …

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 …

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

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

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 …