What is a critical step to take before refilling an LP gas tank?

Before refilling an LP gas tank, checking for leaks using soapy water is a critical step to ensure safety. This method involves applying a mixture of soap and water to the connections and fittings of the tank. If there are any leaks, the soap will bubble up, indicating the presence of gas escaping. This step is essential to prevent accidents such as explosions or fires that could occur if a leak goes undetected. Safety is paramount when dealing with flammable gases, making this check prior to refilling a responsible and necessary procedure.

Other options, while they may seem relevant in different contexts, do not prioritize immediate safety as effectively. For instance, filling the tank to capacity without ensuring it’s free from leaks would be dangerous. Ensuring the tank is empty before refilling is not typically required, as tanks can be refilled without being entirely empty. Checking the weather conditions might be pertinent in specific scenarios but doesn't directly contribute to ensuring the tank's safe operation and integrity.