Irrigation pipe comes in rigid PVC and flexible polyethylene. Here is how they differ and where each is used.
Two kinds of pipe carry water to sprinklers. PVC is rigid white or gray plastic joined with solvent cement. It is strong, handles high pressure and is the standard for mainlines and many lateral lines in areas where the ground freezes. Polyethylene, or poly, is a flexible black pipe joined with insert fittings and clamps. It gives a little when water freezes, so it is common in cold climates, and it is easy to install with a pipe puller.
Each has a place. PVC makes sturdy, long-lasting lines and is simple to repair with couplings. Poly can be quicker to install in tight spaces and is more forgiving when freezing is possible. Fittings and connections are where most problems start, so careful installation, clean cuts and the right glue or clamps matter more than the pipe type itself. Depth, bedding and thrust blocks at turns also protect pipe from movement.
Strong and durable.
Forgiving in freezes.
Glue or clamps.
Match the job.
Protect the pipe.
Most failures start there.
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Each has strengths. PVC is rigid and strong, and poly is flexible and easy to install.
Yes. PVC uses couplings and cement, and poly uses insert fittings and clamps.
It varies, often six to twelve inches for laterals and deeper for mainlines.
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