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One sprinkler zone has low pressure. Changed out the control valve and still the same.

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  • 23 Answers

My guess is a broken sprinkler riser. do you have good pressure if you open valve by hand without timer? Go kick all head make sure none are loose.

Posted on Jun 24, 2013

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Posted on Jan 02, 2017

pbrodersen
  • 1 Answer

SOURCE: My lawn sprinkler a K-Rain Cyclematic Distributing

The internal disk-shaped rubber valve mechanism is failing to rotate. With the water shutoff (mine has no pressure when the controller is set to "off") remove the eight stainless screws on the top, tap it loose, and lift off. You'll see the black rubber disk I am talking about. Pull it out and use wet/dry sandpaper to smooth the inside wall of the aluminum housing it sits in. Mine builds up some roughness from corrosion, which drags on the disk and prevents its rotation.

Posted on May 06, 2012

Zim1308
  • 543 Answers

SOURCE: I have 4 zones on

Did you try reprogramming the timers? The system may have discovered that 3& 4 were not operating and defaulted to 1& 2.

Posted on Jun 26, 2011

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1 Answer

I have several zones that are leaking by when the system is off. It is causing a constant trickle at the low valves in those zones. What do you suggest?


Hi Mike:
Sounds like you are working with a lawn sprinkler system, not cars & trucks.
If that is the case, I'd suspect that when the system was installed some foreign material (sand or dirt) got into the solenoid controlled zone valves.
I would recommend that you dis-assemble and thoroughly flush the valves, then re-assemble and give it a try.
You may ultimately need to replace valves that have been damaged.
Hope this helps.
Cheers,

Mar 05, 2016 | Cars & Trucks

1 Answer

I'm using 2 zones, zone 1 runs fine, zone 2 runs for 5 min, loses pressure for a few seconds, then comes back on for 5 min. etc., etc.etc. Is this a valve or controller problem?


May have air in that valve. Check bleed air screw on side of vale and bleed until you get a steady stream of water then tighten back up.

Aug 01, 2015 | Irritrol Kwik Dial 4 Zone In

1 Answer

How to find the valve that controls zone 6


If the valve is leaking, it's the one that water is coming out of. The question is unclear.

Jul 05, 2014 | Hydro-Rain Garden

3 Answers

Zone 1 stays on all the time even while other zones go


Sprinklers and valves can get clogged. First turn off your controller, then remove Zone 1's valve... see if you can determine if it is clogged. Then clear the clog or replace the valve.

May 25, 2014 | Rainbird Rain Bird Esp-sm3 3-station...

1 Answer

I have a Toro 240-06-04 which is almost identical to the 250. My sprinkler system on the number one valve quit working. I thought maybe it might be a solenoid, so I replaced that and it still didn't w


Connect the wire form a working zone to the valve to zone 1. If the zone comes on you have short in the wire for zone 1. You can confirm this by connecting it to the valve that was working and it probably will not. If you have a spare wire connect it to zone 1 and in pin 1 at
the timer.

If valve still does not open and you replaced the solenoid (which is rarely the problem) the hydraulics are probably worn out in the valve. Purchase the same valve and switch out everything accept the valve body itself essentially rebuilding the valve.

Bad wire, no spare and you want to avoid running a new stretch. Merge this zone with a similar one by connecting both valves to 1 wire. If the pressure is good they should all work as 1 zone. Otherwise you will have to run a new stretch.

Apr 21, 2014 | Toro 250-06-04 1 in. FPT Electric Valve...

1 Answer

One zone has low pressure


Try getting information from the manufacturer.

Apr 12, 2014 | Garden

1 Answer

I have one zone in my sprinkler system that has low pressure. I have changed the control valve and its the same. No signs of broken lines.


If it is a anti-siphon valve remove the anti-siphon cap and let it rip. Remove cap on adjacent valve and let it rip check to be sure the gieser is identical. If so let it run for a long time the leak will eventually show up. Because if it worked before and doesn't work now it has a leak. Water takes the path of least resistance. I have had them access the landscape drain before and you the leak didn't appear until it emptied at the street or followed a gopher hole a few hundred feet before surfacing. Listen carefully you will probably hear it.

If water just dribbles over the anti-siphon portion with cap removed it is still not opening flow control know may be turned down. In fact I would check to ensure this isn't the entire problem turn ir counter clockwise until it stops. This is the round know in the center of the valve.

Apr 21, 2013 | Garden

1 Answer

I have low water pressure on my rainbird sprinkler system. how can i adjust it?


There are several ways to adjust water pressure on sprinkler systems. First you have to determine if there is a problem with the sprinkler system itself. Things to look for:
1.) make sure that all valves including the main are all the way open.
2.) Inspect the sprinkler heads for clogging. Sediment and debris can also clog your sprinkler heads. Some debris removal may be required.
3.) You make have too many sprinklers operating by one valve. You may need to divide a zone and add another valve to increase water pressure.
4.) If all else fails. You can install a breather intake cap to allow air into your sprinkler system thus increasing GPM (gallon per minute)flow.
5.) one of the biggest mistakes that peopel make is that they undersize the water pipe size to save money. Typically you want to use 3/4" PVC pipe for your main runs and tee into 1/2" PVC for your sprinkler heads.
Good luck. I hope this helps.

Jul 20, 2010 | Rain Bird Hardware & Accessories

1 Answer

I have 1 and 1/2 horsepower sprinkler pump that wont prime. As soon as the end piece fills, it will empty if I open the end to the sprinkler.


I don't know what is your system set up. However, the system set up should be the following;
1. Your 1-1/2HP sprinkler pump must be installed at
a fix location nearest the water source. (Complete
with power and plumbing lines.)
2. At the end of the suction line is a vertical check
valve with strainer.
3. The suction pipeline must be connected to the
suction port of the pump.
4. At the discharge port, a flow control valve tee must
be installed. The flow control valve tee top is
covered with a plug, which serves as the priming
port when opened.
5. After the flow control valve, connect a short nipple
so that you can put a gate valve to stop the water
flow or allow the water to flow. You may connect
a pressure tank at this point or you may connect
the pressure hose going to the sprinkler.
6. To prime the pump, open the plug at the flow
control top. Fill it full with water, replace the
priming port plug.
7. Turn the flow control valve to full closed position.
8. From full close position, switch the power on.
9. The pump now run on and off due the pressure
switch setting. Slowly open the flow control valve
such that the water pressure remains steady.
10. Take note of the pressure.
11. Shut the power off, and connect the sprinkler
pump hose.
12. Put the power back on, and allow the pump to
run with the sprinkler.

Under this set up, you can run the sprinklers when your pump is running. Hope this will solve problem.

Dec 08, 2009 | Plumbing

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