There are a number of different rules and restriction that may apply to PEX pipe when placed underground, depending on the jurisdiction. It is becoming increasingly common for homeowners to use PEX pipe underground instead of the traditional metal pipes. this is because there are some advantages to using PEX. For instance, PEX meets the requirements for hot and cold water distribution pipes, and also is less prone to leaking during a freeze. Instead of cracking like the traditional copper pipes, PEX will expand along with the ice that forms inside of the tube, and then will slowly contract as the ice melts. This makes it an ideal material in areas that experience frequently cold weather.
PEX is used both underground and throughout the home to deliver water to the different fixtures in the home. It is easy to lay underground because no flame or soldering equipment is required to create joints and connections, which will save you a lot of time in the long run. Instead of the typical soldering equipment, PEX pipe uses a number of different crimping tools, fittings, and crimp rings to ensure that all of the connections are air tight.
First, dig a trench or hole where you would like the pipe to be installed. Ensure that you have all of your PEX tubing cut to the appropriate size This can be done with a PEX cutting tool. Some individuals choose to use a PVC cutting tool, and while it may work, you would like the cleanest cut that you can produce, so a PEX cutting tool would be ideal.
Ensure that the bottom of your ditch is ready to support the tubing. ensure that you are laying the material on stable soil, so that if there is a leaking issue down the road, you won’t have any sink holes to worry about in your back yard. If you are worried about how stable the trench is, try digging half a foot deeper.
run the tubing along the trench. Make sure that your pipe has enough room to breath; meaning that you have accounted for the fact that PEX pipe will contract and expand depending on the changing in temperature. It is ideal to dig a straight ditch and run one long pipe along the bottom fo the ditch, but if you have no other options, you can create an underground joint as well.
Then, place the protective sleeve around the areas where the pipe enters the home. Ensure that the sleeve extends out at least a foot and a half from the home. Once you have the pipe laid and connected to the system in the home, cover the pipe up again with fresh soil. Make sure that there is nothing int he soil that could potentially puncture the pipe.