The project manager will tell you when is best. Typically, this will happen towards the end of a project. Remember, if you have a gas heater and no natural gas source, it will be your responsibility to have propane on site, the gas line ran the equipment, and all connections made. We will have the pool equipment ready for your provider to hook it up. The reason for this is because the railroad commission regulates LPG products and falls outside of the scope of our master plumbers. This is normal for gas lines anywhere, especially in our industry with pool builds.