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Are your sprinklers on a slope? Could be the water is draining back down through the pipes after they shut off. If you get air sputtering out of the sprinklers when you turn them on then that could be the problem.
Try using the flow controller on the valve to reduce the flow and see if that works. Also could be the plunger in the solenoid sticking. You can unscrew the solenoid but be careful that the plunger doesn't pop out as they are spring loaded. Make sure it move freely. If it doesn't get a new solenoid.
Check that the valves are open all the way. That is most often the cause. It could also be that something is between the riser and the cap causing friction and jamming it. Try turning them on, using your foot to push them down and then releasing them again quickly so that they pop back into position. If it works, problem solved although you might get a bit of a soaking. Other that, look for really obvious problems rather than anything complicated for exotic. Most irrigation equipment problems ar...
Ball valves control the water flow by using a rotating ball that has a hole through the middle of it. When the hole is lined up with the water flow the water passes straight through and when it is rotated at 90 degrees is blocks the flow. It could be that what they are telling you is that there is space around the ball that is letting water leak regardless of the rotation of the ball. Have you tried replacing the valve? Although ball valves tend to last longer all irrigation equipment wears out ...
Have you considered drip irrigation? It sounds like you have quite a tight working area and need to be accurate in what you do. Drip irrigation is great for targeting exactly the plants or places that you want and it uses less water too. Check out the drip irrigation equipment that is available online. It might be a whole new way of approaching the problem that you hadn't considered.
This is quite true. You have to have a backflow preventer. In fact, it is the law in a lot of places so you have not choice. Some places will even tell you exactly which backflow preventer you are required to install so you can see it is taken very seriously. In some places it used in connection with "Cross Connection Control" which is another way of saying preventing backflow. If you haven't got one already then the best place to start is with your local authority to see what they require/recom...
When it comes to putting in the emergency shut off valve try to avoid the 'gate valves'. These are attractive because they are so cheap but you get what you pay for and the tend to wear out and leak a lot quicker. Spend the time and effort on getting a "ball valve", "disk valve", or "butterfly valve" instead. They last much longer. Also consider going online for irrigation equipment parts as it can save you time and money if you can just order what you need directly.
For future reference, most of the time the problem with pop-ups is in the valves, and often as simple as a valve not being fully open. Always check that first. As for the parts you need try these guys for irrigation equipment and products. While we are on the subject, another common problem is sand or grit becoming trapped between the pop-up riser and the sprinkler cap. This can cause the riser to become stuck part of the way up. Try pressing down on the head with your foot to push it back into ...
It could be air in the pipes or even an under-sized water meter, especially if it is a steady thumping at an even pace.
I've seen sprinklers that come with a flexible rubber disc that sits over the head. You can bend down the plastic to block off certain sectors of the spray, but I don't know where to buy them. Perhaps you can make one yourself.
Try checking near your water source. The irrigation system is often connected to the house water rather than a pump. If so, there may be a back flow preventor. You can find that where the municipal water meter is attached to the house. Once you have found that try probing in the ground with a long screwdriver or something similar, but do it carefully so you don't puncture any pipes. If you find anything that is about six inches in diameter under the surface then that should be a valve. You can d...
