
3 solutions to fix a sprinkler with low water pressure
- Solution 1: Turn on valves at backflow device Start with the easiest solution. Make sure the valves at the backflow device are fully open. ...
- Solution 2: Find and repair leaks You can also troubleshoot low water pressure by checking for leaks in the water line. ...
- Solution 3: Check for crushed pipes If you can't locate a leak, the water line may be crushed or obstructed. ...
Full Answer
Why is my water pressure low in my sprinkler system?
It won’t fix the water pressure issue if there are other problems. Sometimes, the valves at the backflow device aren’t fully open and that can cause the pressure to decrease. First, you need to know where the backflow device is. It’s above ground and at least 10 inches above the highest sprinkler head in your yard.
What to do when your sprinklers don't work?
Solution: Wait until water is restored to normal. This is the easiest way to fix the problem if your sprinklers don’t have enough pressure. It won’t fix the water pressure issue if there are other problems.
What to do if your sprinkler head has low pressure?
If a sprinkler head has low pressure and you notice there’s water leaking out near the top of the stem, the sprinkler head components are a little loose. Gently push or step down on top of the sprinkler head to reseat any loose valves or caps. [7] Make sure that your isolation valve is open all the way.
How do I Stop my sprinkler system from backflow?
Some sprinkler systems have a backflow prevention device that keeps water from flowing back in the direction it was coming from. If it’s partially closed, it may throttle your water pressure. Try opening your backflow prevention valve by twisting it counterclockwise as far as it will go to see if that helps. [9]

How do I fix low pressure on my sprinkler system?
If this is the only issue, the fix is simple: access your backflow valves and open them completely to improve your water pressure. Most backflow preventer devices have two pipes: one that is horizontal and one that is vertical.
What causes low pressure in sprinklers?
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.
How do I increase water pressure in my sprinklers?
Remove a few sprinkler heads from each of the zones in your system and cap the plumbing that led to them. Decreasing the number of sprinkler heads will increase the water pressure in those that remain.
Can a bad sprinkler solenoid cause low pressure?
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.
Why are my sprinklers barely spraying?
If you notice that your sprinkler system barely sprays any water or the heads don't pop up when the system is turned on, the system's water pressure is probably too low. The problem may be as simple as closed back-flow valves – check to make sure that your valves are fully open, with the handle parallel to the pipe.
How do I test my sprinkler water pressure?
0:134:15How to Check your Irrigation Water Pressure at Home - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo you screw it in you can look at it it's got a dial on it and it basically goes from zero to 200.MoreSo you screw it in you can look at it it's got a dial on it and it basically goes from zero to 200. Psis. So that's a measurement of pressure pounds per square inch. And you can turn it on.
How do I know if my sprinkler valve is bad?
Signs of issues in sprinkler valve:Water not turning Off: If you notice that water is not closing off from the sprinkler, then there seems to be an issue in the diaphragm valve. ... Leaks of water: ... Broken Sprinkler Head. ... Stuck Valve. ... Wiring: ... Irregular Watering:
Why is one zone of my sprinkler not working?
If just one zone isn't working, the problem is usually an electrical issue or a defective controller or solenoid. To check the controller: Ensure the zone wires are firmly attached to the controller terminals, the transformer is plugged in, and the circuit breaker in the main panel is on.
How do I know if my backflow preventer is bad?
Signs That You Need A Backflow RepairBe discolored, brown, yellow or even pink in color.Have a bad Sulphur smell.Water flow could be slow and / or interrupted.You may visibly see rust particles or sediment in the water.The water could have a bad taste.More items...•
Why does my irrigation pump lose pressure?
Tiny leaks in the supply pipe, leaks in fittings, intakes that can draw air when the water is rough, or dropping water levels can cause a pump to lose its prime.
How do you find a leak in a sprinkler system zone?
1:113:21Finding leaks in your in-ground sprinkler system - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe first thing to do is look and listen do you hear water running. Do you see water bubbling upMoreThe first thing to do is look and listen do you hear water running. Do you see water bubbling up from the ground are there any wet spots or pooling of water.
How do I know if my sprinkler valve is bad?
Signs of issues in sprinkler valve:Water not turning Off: If you notice that water is not closing off from the sprinkler, then there seems to be an issue in the diaphragm valve. ... Leaks of water: ... Broken Sprinkler Head. ... Stuck Valve. ... Wiring: ... Irregular Watering:
Low Sprinkler Pressure – The Usual Suspects!
Diagnosing low water pressure in sprinklers is challenging because there are so many things it could be. Dirty sprinkler heads, your lawn’s elevation, or even the human error of a not-quite-open valve may be behind the problem.
Low Sprinkler Pressure – Culprit Lineup
Do you recognize any of these hoodlums responsible for low water pressure in sprinklers? If so – we’ll share how to reverse their damage. And return your sprinkler into a raging current!
Conclusion
With your crack troubleshooting skills and a few proactive measures, your sprinklers will operate at peak efficiency all summer long.
What happens if your sprinkler water pressure is low?
Low pressure can lead to serious issues in your green area, such as browning, improper water disposal, drying , and so much more. Whenever you install a lawn sprinkler, Austin, TX, make sure you check for the water pressure before the technicians leave to ensure everything is top-range. In case the pressure lowers after a few days or weeks ...
Why is my sprinkler system low pressure?
It could be drawing off the water supply in your area, leading to low pressure. The heightened demand for water could lead to lower pressure for the sprinkler flow. If this is the case, it is better to contact your municipality to confirm the same. Also, ask whether this is a temporary issue or something that needs to be dealt with.
Why is my sprinkler line leaking?
There is a break or leak in your sprinkler or water line. Your sprinkler heads have accumulated dirt or have clogged. The main water or shut-off valve isn’t completely open. There is a water line obstruction. There is an enhanced demand for water supply from the local municipality.
Why is my sprinkler head not popping out?
If the overall pressure coming from your sprinkler head shows that only one or two has low pressure, it could simply be a case of dirty nozzles. To correct this, you need to examine your filter as well as the problematic sprinkler head. In case you could spot the dirt, clean it properly. Apart from this, grass taking over the area can also lead to sprinkler heads failing to pop out perfectly.
How to check if my sprinkler system is broken?
Whenever you start your sprinkler, you will notice bubbling up of water from the site of leakage.
What causes roots to wrap around water line?
Is there any large shrub or tree in the problem area? If this is the case, roots might wrap around your water line & squeeze the same over time. Are there vehicles parked in the area, or do you frequently drive through? This could have caused the weight to compress or crush the waterline.
Can a low pressure sprinkler system cause browning?
You just had your new sprinkler system installed in the garden to make your lawn look all the more beautiful and bam, your first water run, and the pressure is way too low! What can you do about this situation? Low pressure can lead to serious issues in your green area, such as browning, improper water disposal, drying, and so much more. Whenever you install a lawn sprinkler, Austin, TX, make sure you check for the water pressure before the technicians leave to ensure everything is top-range.
What to do if water pressure in house has changed?
The very first step with any water pressure issue is to pay attention to the water in the house, as well as the sprinkler system. If the water pressure in the house has changed, it is highly likely that the main line valve or pressure regulator (both are the very first components found where the city water line meets your primary house water line) is the issue. This would be the job of a plumber.
How to diagnose a sprinkler system?
The very first step in diagnosing an improperly functioning sprinkler system is to check for clogged or misaligned sprinkler heads. This is generally more common if only some of the heads have low pressure, but it is possible to have a full set of clogged sprinkler heads.
What are the different types of sprinkler valves?
There are three types of valves found in all sprinkler systems: 1 Main line water valve (the first valve from the city water to your primary house line) 2 Backflow prevention valve (separates the house’s primary line from the sprinkler system) 3 Zone valves (these control each zone of your sprinkler system)
Can a broken water line leak?
Cracked and broken pipes will leak water, which significantly reduces the “charge” (ie: water pressure) in the lines. Sometimes a line leak can easily be identified without digging, which will typically present itself as standing water in an otherwise dry yard or an isolated dead spot in the grass. Other times, finding the leak is much more difficult.
Do sprinkler heads need to be cleaned?
It is also common to see heads that are no longer spraying the area intended, instead they may be watering a sidewalk or driveway, or away from the intended spray area. If you suspect that your sprinkler heads need to be cleaned and adjusted, it’s always best to have a professional sprinkler technician address the issue.
How to check water pressure?from thespruce.com
To get an accurate reading of your water pressure, you can test the pressure by attaching a water pressure gauge to the outdoor hose spigot closest to the water main or pressure regulator. Recommended water pressure is 52 to 75 pounds per square inch. If your pressure tests very low, this may indicate a failed pressure regulator.
Why is my water pressure bad?from thespruce.com
Another common cause for home water pressure problems is a faulty pressure regulator or pressure-reducing valve. A pressure regulator is a control valve that reduces the input pressure in your plumbing system to a safe level that will not damage your pipes. Not all homes have them, but for those that do, a failing pressure regulator can cause ...
Do You Have Old Steel Water Pipes?from thespruce.com
The most serious and potentially expensive reason for low water pressure occurs when old galvanized steel water pipes are corroded to the point that water flow is significantly restricted. These pipes corrode on the inside (so you usually can't see the corrosion, but over time, the buildup of corrosion and scale gradually closes off the pipe.
Why is my water meter valve partially closed?from thespruce.com
If your water pressure has mysteriously lessened after a recent repair, there is a good chance that the valve wasn't fully opened after the repair was completed.
What happens when a pressure regulator fails?from thespruce.com
When the pressure regulator fails, you will notice the effect on all of the fixtures in the home, and it will happen rather suddenly.
Where is the water meter valve located?from thespruce.com
The first is the water meter valve, located right next to the water meter on the main city supply pipe serving your home.
How much does it cost to replace a water line?from bobvila.com
On average, the replacement of your water line will cost approximately $2250. Replacement of your plumbing fixtures might sound like a significantly cheaper solution, but they could total to more depending on the type and number of fixtures requiring replacement.
How to adjust pressure on impact sprinklers?
Adjust the dial and deflector on impact sprinklers manually. Impact sprinklers are those pop-up sprinklers that shoot back and forth. If you have a system with these sprinklers, try manually adjusting the heads to increase pressure. Every brand of sprinkler is different, but there’s typically a pressure valve on the top that you can turn manually to increase the pressure. There’s also a deflection guard on the side of the head you can adjust to change the breadth of the water.
What to do if there isn't a dial on top of sprinkler system?
If there isn’t a dial on top of the sprinkler, read the manual for your sprinkler system. There may be a nut you can turn with a small wrench.
How to keep water pressure down on lawn?
Try using your sprinklers during non-peak hours. If this is only an occasional problem, it may be the time you’re choosing to water your lawn. Depending on where you live, you may have thousands of neighbors hooked up to the same water main. If all of you use the water at the same time, the overall pressure will be lower. Try running your sprinklers at a time when folks are less likely to be showering or using their sprinkler systems.
How to stop water from flowing back in the direction it was coming from?
Open the backflow prevention valve if you can find it. Some sprinkler systems have a backflow prevention device that keeps water from flowing back in the direction it was coming from. If it’s partially closed, it may throttle your water pressure. Try opening your backflow prevention valve by twisting it counterclockwise as far as it will go to see if that helps.
How to check psi on sprinkler system?
Adjust the pressure regulating dial on your control module. Wherever your system’s control box is located, look for a dial that lists the psi of your system (occasionally, these will be linked to individual sprinklers and there may be multiple dials). If the pressure is a little low, try turning this dial to increase the pressure manually.
How to find the isolation valve on a sprinkler system?
The isolation valve regulates the flow of water for your system. To find it, look for a straight valve on the pipe where the water feeds off of your house and into the sprinkler system (it’s usually in a green box on the ground). The valve should be completely parallel to the pipe it’s on in order to open it all the way.
How far off the ground is a backflow valve?
Some of them are even underground. Usually, they’re a set of 2 pipes coming out of the ground, 12–18 inches (30–46 cm) off of the floor, just outside of wherever your water main feeds into your building.
Why is my sprinkler system not getting enough water pressure?
If you are not getting enough water pressure from your sprinklers, it may be because the main source of water is not providing enough pressure to the valves. 1.
Why is water not flowing through sprinklers?
It is normal to have things be stuck along the tubes of our sprinkler systems. When this happens, water cannot pass freely because something is blocking their way . Twigs, branches, rocks and such can be stuck inside the tubes. Hence, it affects the pressure of the water released.
What Is A Sprinkler System?
Sprinkler systems have many usages – mainly, you can use it to water the plants or as ensured protection from fires when the fire alarm goes off. A sprinkler system provides water pressure to flow pass its long tubes connected to each other from its primary source.
Why do we need sprinklers?
It is safe to say that almost every household uses sprinklers to quench their plants’ thirst or even make sure that their houses are safe from let us say, fire. May it be sprinklers controlled by one’s hands or automatically systemized – they sure come in handy for both efficiency and safety. However, just like any other equipment we have at home, sprinkler systems also have their moments of breakdown. The most common problem we have with these water-providers is a low pressure in one of its zones.
What is a loose solenoid?
Loose Solenoid. A solenoid runs by electricity. This is like a small machine that manages the water flow on the valves in your sprinkler system. A loose solenoid is a problem. If it is not properly closed, one of the valves will remain open after use and can cause low pressure in one of the zones. 3.
What does it mean when a sprinkler goes off?
When the timer goes off, your sprinklers start to do their work. However, if things do not work out the way they should, it is a sign that there is something wrong.
What is a malfunctioning valve?
As mentioned earlier, a malfunctioning valve can be a result of a clogging situation or a result of a valve that completely shut down or even leakage. With this, make sure to clean or replace the valves every occasionally. 4.
Check Your Backflow Preventer Valves
Backflow preventers are a safety feature on irrigation systems that prevents contaminants from entering into the water supply. A backflow preventer is designed with two pipes connected perpendicularly and valves that will open and close each of the pipes.
Stay Connected
Sign up today to keep up with the newest information from one of the Southeast’s leading suppliers of fluid handling equipment!
