What are common mistakes in underground propane tank installation?

Insufficient Excavation and Backfilling

Proper excavation and backfilling of underground propane tanks are critical for ensuring the structural integrity of the tank and preventing potential safety hazards. Digging a trench that is too shallow can expose the tank to damage from soil settlement or other external factors, while inadequate backfilling can cause the tank to float or shift. A minimum excavation depth of 12 inches is recommended, with a 6-inch layer of compacted backfilling to support the tank.

Inadequate Venting and Drainage

Proper venting and drainage systems are essential for preventing gas accumulation and water ingress into the tank. A minimum of two 1-inch diameter vent pipes should be installed, one at the top of the tank and the other at the bottom, to ensure adequate airflow and pressure relief. Additionally, a drainage system should be installed to direct any water that accumulates around the tank away from the excavation site. A minimum slope of 1% is recommended to prevent water accumulation.

Incorrect Tank Installation and Support

Improper installation and support of the underground propane tank can lead to structural damage, corrosion, and potential leaks. The tank should be placed on a level base, with a minimum of 12 inches of clearance around the tank to allow for backfilling and installation of the vent and drainage systems. The tank should also be supported by a stable and level foundation, such as a concrete slab or a sand-filled trench, to prevent shifting or settling.