Home Garden

How to Increase Water Pressure at the Farthest Sprinkler

Sprinklers rely on steady water pressure of about 50 psi to force the nozzle above the ground and cover the lawn evenly with water. When there is new construction in the area, or your municipality is conducting water maintenance, the pressure can drop significantly. This especially affects sprinklers toward the end of the line, as the water loses pressure every time it hits a preceding sprinkler. You can combat low water pressure on your sprinkler line.

Things You'll Need

  • Screwdriver
  • Adjustable wrench
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Instructions

  1. Adjust Sprinkler Flow

    • 1

      Locate the sprinkler head furthest from the sprinkler manifold box. This will likely be the sprinkler that shows signs of low water pressure, or it may not pop up fully.

    • 2

      Pull up the sprinkler head by hand to expose the nozzle.

    • 3

      Insert a screwdriver into the set screw in the top of the nozzle.

    • 4

      Turn the screw counterclockwise until the screw stops. This will open up the nozzle to its fullest flow capacity.

    Adjust the Pressure Regulator

    • 5

      Locate the main water line where it enters your house.

    • 6

      Follow the line until you locate the water pressure regulator, which is metal and sits along the main line near where it enters the house.

    • 7

      Loosen the nut at the bottom of the regulator, using the adjustable wrench.

    • 8

      Turn the nipple at the top of the regulator, using the screwdriver to turn it clockwise until the needle on the attached dial reaches 70 psi. This will increase the amount of water pressure available to your entire home. Tighten the nut once the adjustment is complete.

    • 9

      Run the sprinklers to test the new pressure setting.