Final answer:
The correct level that a properly sized and installed dip tube will extend into a propane DOT cylinder is determined by the design and dimensions of the cylinder. It is generally important to follow the manufacturer's guidelines for proper installation.
Step-by-step explanation:
The correct level that a properly sized and installed dip tube will extend into a propane DOT cylinder is determined by the design and dimensions of the cylinder. A dip tube is a long tube that is installed inside the cylinder to allow liquid propane to be withdrawn from the bottom. It extends to a depth where it can reach the liquid propane. The purpose of this design is to ensure that only the liquid propane is withdrawn, leaving the gaseous propane at the top of the cylinder.
The length of the dip tube is calculated based on the specific requirements of the cylinder. It is essential that the dip tube reaches near the bottom of the cylinder but does not touch it. If it's too long, it may touch the bottom, which can cause the presence of dirt or debris in the propane. If it's too short, it may not be able to withdraw the liquid propane effectively.
Therefore, the correct level that a properly sized and installed dip tube will extend into a propane DOT cylinder is determined by the design and dimensions of the cylinder, and it is important to follow the manufacturer's guidelines for proper installation.