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Lawn Sprinkler Trench Depth


By ProMatcher Staff



How deep should the trench be?



When installing an underground sprinkler system, you will need to dig several trenches in your yard in order to lay the water pipes. The depth of the trenches will vary depending on your geographical location. Your best option is to dig a trench that is deep enough for the water pipes to rest below the frost line. Additionally, the deeper the trench, the less likely it is to be damaged by future landscaping projects or to become tangled in plant roots.

Moderate Climates

In a warm to moderate climate, the trench only needs to be 8-12 inches deep. However, these shallow pipes may be vulnerable to damage from the surface and should be made of metal, rather than plastic.

Cold Climates

In colder climates, the trench should be deeper and at least 18 inches deep. If you live in an area that experiences regular freezes and extreme cold, you will want to seek the advice of a landscaping professional to determine where the frost line lies.

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CAUTION: Before digging the trenches, make sure to mark where the underground utility lines are located. Accidentally puncturing a gas line can be a costly mistake.



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ProMatcher Staff, ProMatcher
Orlando, FL 32803

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