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FAQs
They are pipes made from Unplasticized Polyvinyl Chloride (UPVC) and are used as well casing or riser pipes in water wells due to their:
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High corrosion resistance
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Lightweight design
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Long service life
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Non-reactivity with saline water
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They do not rust like metal pipes
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Excellent resistance to salts and chemicals
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Smooth internal surface reduces friction losses
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Lower cost compared to stainless steel
| Type | Function |
|---|---|
| Casing | Supports the well wall and withstands soil pressure |
| Riser | Lifts water and carries the pump weight and operating pressure |
It refers to the maximum pressure rating the pipe can withstand (e.g., PN10 – PN16 – PN25).
The PN rating should be selected based on:
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Water depth
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Operating pressure
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Possibility of water hammer
Yes, provided that:
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A suitable Class is selected
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Tensile stress caused by pump weight and water column is properly calculated
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A safety factor of at least 2 is applied
It depends on:
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Allowable tensile stress of the material
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Pump weight
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Cable weight
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Weight of the water column
They are recommended for water temperatures not exceeding 45–50°C.
Yes, in the following cases:
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Selecting a PN rating lower than required
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Incorrect installation
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Excessive tightening during installation
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Severe water hammer
A smaller diameter increases:
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Friction losses
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Pump load
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Reduced efficiency
Usually by a threaded system.
It is important to:
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Use a proper pipe wrench
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Avoid over-tightening
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Ensure threads are clean
They do not require direct maintenance, but it is recommended to:
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Check tightening torque
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Inspect for cracks during pulling and servicing
Typically 25 to 50 years, depending on:
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Manufacturing quality
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Operating conditions
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Installation method