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How deep do the trenches for a lawn sprinkler system need to be in a cold climate that experiences deep freezes?

0-6 inches deep
3%
6-12 inches deep
25%
12-18 inches deep
24%
18-24 inches deep
17%
24+ inches deep
5%
It depends on the frost line in that area
13%
Not sure
10%
Next Question
Question: How deep do the trenches for a lawn sprinkler system need to be in a cold climate that experiences deep freezes?
Top Answer (25% of 58 votes): 6-12 inches deep.

Answer: 18-24 inches deep
Explanation: this depends on the frost depth at lest 18-24"
Turning Point Landscape Services
Answer: 6-12 inches deep
Explanation: The depth of a trench for irrigation purposes will differ fr region to region. Depending upon frost line depths as well as city codes, trench depth will vary.
DIAMONDBACK Service Management
Answer: 18-24 inches deep
Explanation: Above 18 inches is typical for a cold climate mainline installation. Winterization techniques can help with this if other components or mainline is not installed correctly.
Sprinkler Guy KC
ProMatcher
Answer: 24+ inches deep
Explanation: Freezing temperatures rarely reach below 24 inches deep, though soil composition can play a role.
All Star Clean Up
Answer: 6-12 inches deep
Explanation: In colder climates, your sprinkler lines should be buried deeper to remain below the frost line.
LawnScapes
Answer: 6-12 inches deep
Explanation: That depends on the part of the country you live in.
Pro Cuts Lawn and Irrigation Service
ProMatcher
Answer: 12-18 inches deep
Explanation: The colder the deeper the pipe needs to rest.
BlueMark Water
Answer: 12-18 inches deep
Explanation: You must bury the pipes below the frost line in the soil to avoid the pipes from freezing and bursting.
Lawn Saver Irrigation
Answer: 6-12 inches deep
Explanation: we blow out system of all water when it gets cold
vetorinos landscaping and irrigation,llc
ProMatcher
Answer: 18-24 inches deep
Explanation: it depends on exactly how cold it is but for the most part after two feet in the ground you're not really getting any freezing there and that's what causes the damage to the pipes water freezes it expands and then the PVC breaks
Webster's Lawn care
Answer: Not sure
Explanation: My company sells building fire sprinkler systems, not lawn sprinkler systems.
SimplexGrinnell
Answer: 18-24 inches deep
Explanation: As long as you make sure to blow out your system at the end of every year before the first deep freeze it will not make a difference in the depth
Stricklins Landscaping
ProMatcher
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