How do I fix low water pressure in my sprinkler system?

Asked by: Scott Paquette

If the pressure is low at only one or two sprinkler heads, they may simply be dirty. Examine the sprinkler head and filter and clean if needed. Grass can also grow around the base of the sprinkler heads and cause them not to pop up fully, so trim and clear away any obstructions.

Why does my sprinkler system have low pressure?

One of the leading reasons for low sprinkler water pressure relates to the valves on your backflow preventer device. If you notice limited water pressure in your sprinkler system but normal water pressure inside your home, then the problem might be that your backflow preventer valves are not completely open.

How do I increase water pressure in my sprinkler system?

Hook up a sprinkler booster pump for your hose.



All you do is hook your hose up to the pump, and then hook another hose up that runs from the pump to the sprinkler. Plug the pump in and turn the water on. The pump will artificially force water out of your weak water line at a much higher psi.

Why does one of my sprinkler zones have no pressure?

Often when your sprinkler system was running fine, and then one zone began to lose water pressure, the culprit is a leak in the zone’s lines or a leak at a nozzle or two. Leaking nozzles won’t produce the same water pressure and need to be replaced, which is fairly simple.

Can a sprinkler solenoid cause low pressure?

The solenoid controls the water pressure. Knowing that, it’s not surprising that a bad solenoid can lead to water pressure issues. If your system isn’t delivering water to every corner of the lawn like it once did, the solenoid is one of the most likely culprits.

Why won’t my sprinkler heads pop up all the way?

Sprinkler Heads In Most Or All Zones Won’t Pop Up.



Check all of the valves to make sure they are fully open, especially the main system shut-off valve and the valves on your backflow preventer. A partially closed valve will reduce the water to the sprinklers, causing them to not fully pop up.

How do you know if sprinkler solenoid is bad?

Signs that Your Sprinkler Valve Solenoid is Bad



Water leaks: High pressure from a broken solenoid can put a lot of stress on your sprinkler system and burst small or large leaks throughout it. Low water pressure: Low water pressure can be just as much of a problem.

Where is my sprinkler solenoid?

It's a little advanced. But basically what we're going to do is going to take the black lead off the ground stake.

How much does it cost to replace a sprinkler solenoid?

Sprinkler System Repair Cost by Type of Replacement