Consumers often feel that a tank leak results in the loss of many gallons of propane gas, but in reality, the loss is typically minimal.
First, please realize it is common to hear a gentle hissing/humming sound when an appliance is running. You should only be concerned if you smell gas (see next question below).
In terms of loss of propane, think about a helium tank filling a balloon and the loud hissing noise and force at which the helium comes out of the tank. Now think about your propane tank. A standard size party balloon holds a volume of roughly .5 cubic feet. Just one gallon of propane, which produces 36.39 cubic feet of vapor, will fill almost 73 standard-size party balloons. So if you believe your tank has leaked 10 gallons of propane, that would equate to roughly 728 standard size party balloons! The actual amount of propane lost in a leak is far less than what most consumers would imagine.
Bottom line: if you ever suspect a leak, contact MEC immediately!