What causes a pop up riser to rise?

What causes a pop up riser to rise?

• A. Suction
• B. Timer
• C. Water Pressure
• D. Electric current

Answer: (C)

Pop-up risers rise because water pressure in the irrigation line pushes up on the sprinkler head. When the system is on, pressurized water drives a piston or stem inside the head, lifting the riser above the soil so the sprinkler nozzle is positioned for spray. Once water flow stops, springs and seals pull the head back down. Suction wouldn’t lift the head; it would tend to pull things inward. A timer simply controls when water is delivered, not the physical movement of the head. An electric current powers the valve that releases water, but the actual rising action comes from the pressure of the water itself.

Pop-up risers rise because water pressure in the irrigation line pushes up on the sprinkler head. When the system is on, pressurized water drives a piston or stem inside the head, lifting the riser above the soil so the sprinkler nozzle is positioned for spray. Once water flow stops, springs and seals pull the head back down. Suction wouldn’t lift the head; it would tend to pull things inward. A timer simply controls when water is delivered, not the physical movement of the head. An electric current powers the valve that releases water, but the actual rising action comes from the pressure of the water itself.