When it comes to installing tubing underground, there are several factors to consider. The type of tubing being used, the purpose of installation, and the surrounding environment all play a crucial role in determining whether the tubing can be installed underground. In this article, we will explore the different types of tubing and discuss their suitability for underground installation.
Types of Tubing
1. Water Supply Tubing
Water supply tubing is commonly used for plumbing systems, irrigation, and underground water distribution. Most types of water supply tubing, such as copper, PEX (cross-linked polyethylene), and PVC (polyvinyl chloride), can be safely installed underground. However, it is important to factor in any local building codes or regulations that may restrict the use of certain materials.
a. Copper Tubing
Copper tubing has been a popular choice for water supply for many years due to its durability, corrosion resistance, and ease of installation. It can be safely installed underground as long as proper precautions are taken to protect it from corrosive soils and ensure its longevity.
b. PEX Tubing
PEX tubing is a flexible plastic tubing that has gained popularity due to its ease of installation and resistance to freezing and bursting. PEX tubing is often used for underground water distribution systems and can be safely installed underground. However, UV exposure can degrade the tubing, so it is necessary to protect it with insulation or bury it deep enough to shield it from sunlight.
PVC Tubing
PVC tubing is commonly used for both water supply and drainage systems. It is a cost-effective option that can withstand underground installation. However, it is important to use Schedule 40 PVC, which is specifically designed for underground use, as it has thicker walls to withstand the pressure from the soil above.
2. Electrical Tubing
Electrical tubing, such as conduit or electrical metallic tubing (EMT), is used to protect electrical wires and cables. Most electrical tubing can be installed underground as long as it complies with the National Electrical Code (NEC) regulations. Underground electrical tubing must be rated for direct burial.
3. Gas Tubing
Gas tubing, usually made of materials like steel or polyethylene, is used for natural gas distribution within buildings or underground lines. Gas tubing can be safely installed underground, but local regulations and codes should be followed to ensure compliance.
Factors to Consider for Underground Installation
1. Soil and Environmental Conditions
The type of soil and environmental conditions in the area where tubing will be installed should be carefully evaluated. Corrosive soils, saturated or waterlogged conditions, and high groundwater levels can all impact the performance and longevity of underground tubing.
2. Depth of Burial
The depth at which the tubing is buried is crucial for its protection. Different types of tubing have varying depth requirements to prevent damage from external factors like construction activities, freezing temperatures, or UV exposure.
3. Protection and Insulation
Tubing installed underground should be protected with adequate insulation or encased in protective sleeves to safeguard it from potential damage caused by shifting soil, abrasive materials, or external elements.
Several types of tubing can be safely installed underground, including water supply tubing, electrical tubing, and gas tubing. However, it is essential to consider factors such as soil conditions, local regulations, and protection measures to ensure the longevity and integrity of the tubing system. Proper installation techniques, adherence to building codes, and routine maintenance are vital for successful and reliable underground tubing installations.