Q:
# How do you calculate water flow for a given pipe size?

A:
### Quick Answer

**To calculate the water flow rate through a given pipe size, multiply the area of the inner cross-section of the pipe by the velocity of the water.** The velocity of the water is required for this calculation.

Pipe sizes are usually given in diameters, as most of the pipes in use are round. To determine the area of the inner cross-section of the pipe, first divide the diameter by two in order to find the radius. The area of a circle is equal to pi x radius x radius. Multiplying the area by the velocity of the water yields the volume of water flow per unit of time.

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Q:
## How do French drains work?

A:

Full Answer >**A French drain uses gravity to direct excess water into a gravel-filled channel, where a buried pipe carries it away to a more suitable drainage area.**The gravel allows water to fall easily to the drainpipe without leaving a large gap in the surface soil.Filed Under: -
Q:
## How do you repair a pinhole leak on a copper pipe?

A:

Full Answer >**To repair a pinhole leak on a copper pipe, first turn off the water, drain the pipes, cut out the affected area and solder on a new pipe coupling.**Using a coupler is acceptable for pinhole leaks where less than 1/2-inch of pipe needs to be removed.Filed Under: -
Q:
## How do you do simple flow calculations?

A:To perform a simple flow calculation, multiply the flow area by the flow velocity to determine the flow rate. Ensure that the units of length are consistent when performing calculations. If, for example, the flow area is measured in square meters, the flow rate should be expressed in meters per second. To determine flow rate based on the capacity of a tank as it fills, divide the capacity of fluid stored by the time storage takes.

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Q:
## What are some good pipe flow calculators?

A:Good pipe flow calculators include an orifice flow calculator, an air flow calculator and a compressible gas flow calculator. Two of these calculators measure how well the substance inside the pipe flows through it, and the other determines where the measurement is taken.

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