Riser Pipe for Borehole Pumps: Steel, Plastic or Hose?
In a deep well, the riser does two jobs at once: it carries the water up, and it carries the weight of the pump, the cable and the water inside it. Deep well submersible pumps place no special demand on the riser material, as long as it can take the pressure and the load.
| Riser | Good for | Watch out for |
|---|---|---|
| Steel pipe with flanges | Deep settings, high heads, large pumps | Weight, and corrosion in aggressive water |
| Stainless steel pipe | Corrosive or drinking water | Cost |
| Plastic pipe | Shallower settings within its pressure rating | Pressure at the bottom of the column, and the hanging load |
| Flexible hose | Light pumps, temporary or quick installation | Its pressure and load rating, and twisting on start |
Pressure at the bottom
The bottom of the riser sees at least the full head of the pump. A pump rated for 200 m puts about 20 bar on the lowest joint, so choose the pipe and gaskets for that, not for the pressure at the top.
Fixing the cable
Fix the cable to the riser at every pipe, in the groove of the flange where there is one, so it cannot rub against the well wall or be crushed by the clamps when the pump is lowered.
Products in This Series
Deep Well PumpsCustom-Built Deep Well Pumps: Motor Power, Impeller Size and Hole Spacing Made to Order
Deep well pumps built to your well: we set the motor power, impeller size and hole spacing to suit your borehole, your duty and your existing pipework.
Deep Well PumpsFountain Pumps: Stainless Steel and 24 V Low-Voltage DC Models
Submersible fountain pumps in stainless steel, including 24 V low-voltage DC models for pools and water features where people are close to the water.
Deep Well PumpsDeep Well Pumps for Construction Dewatering
Deep well dewatering lowers the groundwater around an excavation using a ring of wells and submersible pumps. How it works and how to choose the pumps.
Need a pump for your application?
Our engineers respond to technical inquiries within 24 hours.
Get a Quote