What type of pipe should be used for running underground to a pool heater?

When running a gas line underground to a pool heater, polyethylene (PE) pipe is the most suitable option due to several key properties that make it ideal for this application. PE pipe is specifically designed for underground installations because it is lightweight, flexible, and resistant to corrosion. This resistance is crucial for maintaining the integrity of the gas line over time, especially in various soil conditions.

PE pipe also has a good strength-to-weight ratio, allowing for easier handling and installation. Additionally, it has a high tensile strength and can accommodate the movements of soil without risk of cracking, which is an important consideration for underground applications where ground shifting can occur.

Furthermore, PE pipe is typically rated for natural gas and is compatible with the fittings and equipment commonly used in gas installations, ensuring safety and reliability in transporting gas to the pool heater.

While other types of pipes like PVC and CPVC are used in various plumbing applications, they are not suitable for gas transport, especially underground. PVC and CPVC can be rigid and may not offer the same level of protection against environmental factors compared to PE pipe. Therefore, PE pipe stands out as the ideal choice for running underground to a pool heater.