Maya Ellison
Underground pipes are used for drains, vents, and waste piping. They are typically made from PVC, which is durable and does not rust. When installing underground pipes, it is recommended to use large pipes and bury them at least 2 feet deep to protect them from accidental damage and make wire pulls easier. There are various anchoring solutions available for securing underground pipes, such as screw-type anchors, cable anchors, and ground anchors. Additionally, proper sealing of pipe ends is important to prevent dirt from entering, and duct tape or PVC caps can be used for this purpose.
| Characteristics | Values |
|---|---|
| Pipe material | Polyvinyl Chloride (PVC) |
| Pipe properties | Durable, cheap, doesn't rust |
| Depth of pipe | 2 feet deep |
| Sealing pipe ends | Duct tape, PVC caps, sticky tape, epoxy, hose clamps, rubber tape |
| Anchoring solutions | Platipus Ground Anchors, Arrowhead cable anchors, Penetrator screw-type anchors |
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What You'll Learn
Use screw-type anchors, Arrowhead cable anchors, or Platipus Ground Anchors
When anchoring plastic underground pipes, one method you can use is screw-type anchors. These are exactly as they sound—anchors that are screwed into the ground to hold down your pipe. They are simple to install and can be purchased at most hardware stores.
Another option is Arrowhead cable anchors, which offer superior holding in hard, compact, and rocky soils. They are available in steel and aluminum and are installed with a drive rod. Arrowhead cable anchors are a good choice if you're dealing with challenging soil conditions that might cause issues with other types of anchors.
Platipus Ground Anchors are another reputable option, with over 40 years of experience in providing ground anchoring solutions. Platipus offers a range of standard pipe anchoring solutions that are perfect for small and large pipelines, doing away with the need for traditional, more difficult methods. Their anchoring systems are ideal for stabilizing slopes and they also offer solutions for tree anchoring, irrigation, and distribution network upgrades. Platipus Percussion Driven Earth Anchors (PDEAs) are a versatile option that can be rapidly deployed in most displaceable ground conditions.
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Bury pipes deep to protect from shovel probes or sprinkler repairs
Burying pipes deeper is a good way to protect them from shovel probes and sprinkler repairs. Firstly, it is important to determine the path of the sprinkler line. This can be done by marking the path with stakes and strings, considering any obstacles such as trees and shrubs. Once the path is determined, it is recommended to soak the digging area with water for at least an hour a day or two before the planned digging to soften the soil and make it easier to work with.
When it comes to the depth of burial, the general rule of thumb is to err on the side of caution and bury sprinkler lines deeper than necessary. This will protect the pipes from damage caused by lawn equipment or freezing temperatures and ensure the long-term functionality of the sprinkler system. The recommended depth varies depending on the climate and the size of the yard. In freezing areas, deeper trenches are required to protect the pipes from freezing, with a depth of at least 10 inches being sufficient in most cases. In warm climates, shallower depths are acceptable, with 8 to 12 inches being the standard range.
The size of the yard also plays a role in determining the burial depth. Larger yards require deeper trenches for wider pipes, while smaller yards need shallower trenches for smaller pipes. It is important to note that the pipe size is crucial, as the wrong size can lead to issues with water pressure, coverage, and even flooding. Standard PVC sprinkler pipes have a diameter of 1.5-2 inches, but this can be adjusted based on the size of the yard and the number of sprinkler heads.
To make the digging process easier, it is recommended to use specialized tools such as a drainage spade or a trenching hoe. A drainage spade, also known as a Sharpshooter shovel or tile spade, has a rounded blade perfect for digging trenches and a long handle for leverage. A trenching hoe has a flat, thin blade that can cut through roots and loosen the soil, also with a long handle for ease of use. For larger projects, renting a trenching machine can significantly reduce the labour required.
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Seal pipe ends with duct tape or plumbers PVC caps
When anchoring plastic underground pipes, it is important to seal the pipe ends with duct tape or plumber's PVC caps to prevent dirt from entering the pipes. Here are some detailed instructions on how to do this:
Using Duct Tape
Duct tape is a simple and effective way to seal pipe ends. Start by wrapping the tape around the pipe with the sticky side out if you plan to extend the pipe later. This will make it easier to remove the tape without leaving a residue. Otherwise, wrap the tape with the sticky side in, ensuring that it is tight and secure. Make sure the tape is smooth and flat, with no bunching or gaps. Duct tape provides a quick and easy seal, but it may not be as secure as PVC caps for larger pipes.
Using Plumbers PVC Caps
Plumbers PVC caps are designed to seal pipe ends completely and snugly. They are typically pushed into the end of the pipe, creating a tight seal. Some caps come with an attached string pool loop, which makes installation and removal easier. PVC caps are quick and easy to install and provide a more secure seal than duct tape, especially for larger pipes. They are also a good option if you need to seal multiple pipes, as they can be installed quickly and efficiently.
Using Teflon Tape (Plumber's Tape)
Plumber's tape, also known as Teflon tape, can be used to seal pipe threads and create a watertight connection. It is important to wrap the tape in the same clockwise direction as how the pipe will turn into the fitting. This will create tension and help the tape stick to the pipe. Ensure the tape lies flat and is applied tightly against the threaded joint. Plumber's tape can be used on various pipe materials, including metal and rigid plastic, but it is not recommended for PVC, copper, or PEX pipe threading, as these usually have a built-in gasket or O-ring.
When choosing between duct tape, PVC caps, or Teflon tape for sealing underground plastic pipe ends, consider the ease of application, security of the seal, and the possibility of future pipe extensions. Each method has its advantages and is suitable for different scenarios.
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Repair small leaks with fibreglass resin tape or cloth
Repairing small leaks with fibreglass resin tape or cloth is a straightforward process. Before beginning, ensure you have the necessary materials: fibreglass resin tape or cloth, scissors, a brush, and a container for mixing. It is important to note that this method is not suitable for repairing joints.
First, turn off the water supply and drain the pipe to ensure it is empty. Then, clean the leaking area of the pipe thoroughly. You can do this by sanding the surface with high-grit sandpaper to create an extra adhesive surface.
Now you are ready to apply the fibreglass resin tape or cloth. If using tape, cut it to size, ensuring it covers the damaged area with an extra inch on each side. Wrap the tape tightly around the pipe, overlapping each layer slightly. Smooth out any air bubbles and seal the cloth with tape. If using cloth, dampen it, apply a thick, painted-on coat of resin/catalyst mixture to the leaking area, then apply the cloth.
Finally, allow the repair to cure. Refer to the manufacturer's instructions for the curing time of the specific product you are using. After the curing process is complete, you can turn on the water supply and check for any remaining leaks.
This repair method provides a strong, waterproof seal that can withstand significant pressure. It is a quick, inexpensive, and permanent solution for small leaks in PVC pipes.
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Identify the cause of pipe damage and address it
Underground pipe damage can occur due to various factors, and it is essential to identify the specific cause to implement effective solutions. One of the most common causes of pipe damage is the mechanical wear that occurs over time due to contact with fluids or gases. This internal corrosion can impair or even destroy pipes and depends on the quality of the pipe materials and the aggressiveness of the corrosive medium. Incompatible materials used in pipes, fittings, sealing materials, and gasket rings can also cause corrosion.
Another significant factor leading to pipe damage is the presence of flow obstacles within the pipe. This can include hardened depositing or incrustation, which occurs when internal materials settle under gravity, and man-made obstacles such as construction components that pass through underground infrastructure. Tree roots can also cause similar issues, with their gradual growth putting pressure on pipes and leading to cracks and leaks.
Underground movements, such as earthquakes and tremors, can cause ground displacement and pipe damage. In addition, vibrations from heavy vehicle traffic can compact soil and crush pipes, and the repeated pressure in the same spot can weaken and eventually fail pipes. Incorrect pipe laying can also cause damage, so it is essential to hire a professional licensed plumber for underground pipework to ensure pipes and connectors are laid appropriately.
The age and quality of pipes are also factors to consider. Older or lower-quality pipes are more susceptible to breakdown and leaks. If your house was constructed many years ago, your underground pipes may be reaching the end of their lifespan, which is typically between 10 and 70 years.
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Frequently asked questions
Platipus Ground Anchors and Arrowhead cable anchors are two anchoring solutions for securing plastic underground pipes.
It is recommended to use large pipes and bury them at least 2 feet deep to prevent damage from shovels or sprinklers. Seal the pipe ends to prevent dirt from entering and use 90-degree sweeps to make wire pulls easier.
First, locate the water meter and use the shut-off valve to turn off the water supply. Then, inspect the surrounding soil for any tree or plant roots that may have caused damage. If it is a small leak, you can use fiberglass resin tape or cloth, rubber and silicone repair tape, or epoxy to fix the pipe. For larger leaks, you may need to replace the pipe.
