To find underground sprinkler lines, first map the system visually by turning on each zone and flagging visible heads. Connect the dots to trace the lines, then verify hidden pipe paths using either a metal soil probe or by renting an electronic wire tracer.
To find your sprinkler lines without digging, use a wire tracer (or line locator) to follow the electrical wires that run alongside the pipes, or rent an electronic water detection device. Alternatively, you can run the system and probe the soil for pipes or visual landmarks.
If you're wondering how to find sprinkler lines without digging or need tips on how to find PVC sprinkler lines, tools like wire locators or electronic line tracers can help pinpoint their location with ease.
How to Find Sprinkler Lines
Other secondary private utility lines can include site lighting, storm sewer lines, irrigation lines, underground storage tanks (USTs) and vent pipes. The 811 One Call system will generally not mark secondary utilities and will not provide the depths of any utilities as part of their locate.
Dig for Your Sprinkler System
Lay out the location of the lines with stakes and string. Place a flag or other marker where the sprinkler heads will be located. The trenches will be relatively shallow, usually 6 to 12 inches deep, depending on your area's freeze cycles and frost severity.
We can tap our transmitter into any working water line via a hose bib, sink, or fire hydrant to make the line traceable. From there we can chase the path of the water line up to 400′ with good conditions. For locations in our normal service area we charge *$200 / hour.
A common rule that is followed for obstructions within 18 inches of the sprinkler deflector is the “three times rule”. This requires sprinklers to be positioned away from obstructions a minimum or three times the maximum dimension of the obstruction.
The location of a building sprinkler system is typically shown on the plumbing plan or a specialized fire sprinkler system drawing (often referred to as a sprinkler blueprint or shop drawing).
Yes, an irrigation system can leak even when turned off. This typically happens for one of three reasons:
Most standard stud finders cannot detect empty PVC pipes because they rely on magnets or radio frequencies that require density or metal. To locate plastic pipes, you need a specialized radar-based wall scanner or a stud finder with specific plastic-pipe detection modes.
You need a wire locator/tracer. Some irrigation supply stores have one that you can borrow.
The best tool for finding sprinkler lines depends on your goal and budget. For tracing underground PVC pipes, an electronic line tracer (like the Armada Pro700) is ideal because it sends a traceable electronic signal along the wires running alongside the pipe.
Sprinkler lines can be located using a combination of visual inspection, mapping, and specialized tools like soil probes, electronic wire tracers, or ground-penetrating radar. Because sprinkler systems are private lines, public utility services like 811 will not mark them, so the responsibility falls to the property owner.
To find buried sprinkler wires, the most reliable method is using an electronic wire tracer (also called a cable locator). These devices transmit a signal down the wire, allowing you to follow the signal and pinpoint the wire's exact path without digging up your yard.
To determine if your irrigation system has an underground leak, perform a simple water meter test. Turn off all indoor and outdoor water sources, including the irrigation controller. If the low-flow indicator on your water meter continues to move, you have a leak in your system.
Most homeowners insurance policies will not cover water line breaks unless a line has undergone sudden, significant damage. For example, if you dig in your yard and accidentally damage the water line running from your meter, repairs and cleanup may be covered.
When to Call a Professional Plumber. The expert plumbers at Roto-Rooter aren't just here to plunge your toilet. They are fully versed in addressing maintenance and repair issues for your outdoor plumbing systems, often including sprinklers and irrigation.
To find your sprinkler lines without digging up your entire lawn, start by turning on the system to visually map the visible heads and trace the straight lines between them. For the hidden pipes, use a metal wire tracer, try the "dowsing" method with coat hangers, or carefully probe the soil.
The “three times rule” found in NFPA 13 states that “sprinklers shall be positioned away from obstructions a minimum distance of three times the maximum dimension of the obstruction.” For example, if a ceiling fan hub measures 4 inches by 7 inches, the sprinkler must be positioned at least 21 inches away from the hub.
811 covers utilities. Private improvements like sprinklers, wires for lights etc are home owner's responsibility. Map them out while you can. When you call 811 they ask if you need a private contractor to search and mark private stuff— you don't need this service if you know where it is, already.
The ideal watering schedule for a sprinkler system depends on factors like lawn type, climate, soil, and sun exposure, but a general guideline is to water 2-3 inches per week, divided into 2-3 sessions. "Put out several empty tuna cans or cups in each zone and run that zone until you get one inch of water.
The number of sprinklers you can run on one line depends on your pipe size\ flow rate, PSI water pressure, as well as the type and number of sprinkler heads. Generally, you can run between 4 rotors or 10 sprinkler spray heads per zone ,depending on GPM gallons per minute.
The 18-inch rule for fire sprinklers requires maintaining a minimum 18-inch vertical clearance between a sprinkler head’s deflector and the top of any stored materials, equipment, or furniture. This ensures the sprinkler can distribute water evenly without obstruction.