What Size Pipe For Sprinkler System?

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When installing a sprinkler system, you will need to choose the size of pipe you will use. So, what size pipe for sprinkler system? 

We will explore the different sizing options for sprinkler systems and help you decide which option is best for you.

What Size Pipe For the Sprinkler System?

The diameter of the sprinkler pipe from the water supply source to a sprinkler shall be not less than 3/4 of an inch (20 mm). 

The hose from the supply to the sprinkler shall be of a size that will deliver the desired amount of water.

The size of the pipe, hoses, and sprinklers will determine how much water your system can use. 

The most common residential size for lawn sprinkler systems is 1/2″.  

Here is a table outlining the recommended pipe sizes for sprinkler systems based on the flow rate and pressure of the system:

Flow Rate (GPM)	Pressure (PSI)	Pipe Size (Inches)
0-10	20-50	3/4
10-20	20-50	1
20-35	30-50	1 1/4
35-50	30-50	1 1/2
50-80	40-70	2
80-120	50-75	2 1/2
120-160	60-75	3
160-240	70-80	4

What Type Of Pipe To Use For Sprinkler Systems?

There are two types of irrigation pipe that you can use for your sprinkler system: rigid PVC and flexible polyethylene.

Each type has its own advantages and disadvantages, so it is important to choose the right one for your needs.

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Rigid PVC Pipe

PVC pipes are a popular choice for sprinkler systems because they are lightweight, durable, and easy to install.

They are also resistant to corrosion and chemical damage.

CPVC Pipe

CPVC pipes are similar to PVC pipes but can handle higher temperatures and pressures. They are also more expensive than PVC pipes.

Polyethylene Pipe

Polyethylene pipes are flexible and can be easily bent to fit the contours of your yard.

They are also resistant to freeze damage, making them a good choice for colder climates.

Galvanized Steel Pipe

Galvanized steel pipes are a heavy-duty option that can handle high water pressure and are resistant to corrosion.

They are typically used in commercial or industrial settings.

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What Is The Average Depth Of A Residential Sprinkler System?

To determine how deep to dig the trenches for your sprinkler lines, you must take into account various factors such as the sizes of different components that make up the underground system.

Supply Line Depth

The supply line is the main water source for your in-ground sprinkler system. 

The average depth for a residential sprinkler system’s supply line is 3/4 to 1 inch in diameter. 

The lines should be at least as deep as the pipe’s diameter plus 4 inches.

By burying the pipe underground, we will make sure it is better insulated and won’t as easily be disrupted by what’s happening on the surface.

Sprinkler Depth

The average sprinkler depth is 4 to 6 inches. The main reason for this is so that the head of the sprinkler is not sticking up too high out of the ground. 

You don’t want children or lawnmowers hitting them and breaking them.

Another reason for a relatively shallow depth is so that the water will evenly distribute across the head’s width. 

To provide an example, a 2-inch sprinkler on top of a 3-inch riser that has a 1-inch supply line needs to be buried at least 6 inches deep.

Depth For Grass Surfaces

The average depth for a residential sprinkler system’s supply line is 3/4 to 1 inch in diameter. The lines should be at least as deep as the pipe’s diameter plus 4 inches. 

By burying the pipe underground, we will make sure it is better insulated and won’t as easily be disrupted by what’s happening on the surface. 

The sprinkler holes are set at a depth of 3 feet, with the riser and supply line ensuring that the grass isn’t damaged.

The depth of an in-ground sprinkler system varies depending on different factors.

It is important to take into account all of these factors before you start your project so that you can ensure a successful installation.

Does Increasing Pipe Size Increase Water Pressure?

Increasing the size of a pipe may or may not increase water pressure, depending on various factors. Here are some issues to consider:

Flow Rate:

Increasing the size of a pipe will increase the flow rate, but it does not necessarily mean that the water pressure will increase.

In fact, the water pressure may decrease if the flow rate is too high.

Friction Loss:

As water flows through a pipe, it encounters resistance, which results in a loss of pressure known as friction loss.

Larger pipes have less friction loss than smaller pipes, which means that the water pressure will be higher.

Water Demand:

The amount of water needed to meet the demands of a household or a commercial building will also impact the water pressure.

If the water demand is greater than the supply, increasing the pipe size may not increase water pressure.

Pump Capacity:

If the water supply is from a pump, increasing the pipe size may not increase the water pressure if the pump is not powerful enough to generate the necessary pressure.

Distance:

The distance from the water source to the outlet also affects water pressure. If the distance is too great, increasing the pipe size may not increase water pressure.

FAQs on what size pipe for sprinkler system

Final Thoughts

Selecting the right size pipe for a sprinkler system is critical to ensure proper water flow and coverage.

The size of the pipe will depend on factors such as the water pressure, the distance between sprinklers, and the flow rate.

It’s important to consult with a professional to determine the appropriate pipe size for your specific needs.