what is a water muffler?

Question

found on a forklift

Answer 1

Here is the best definition.
Water Muffler - A special muffler utilizing a water trap to prevent the emission of sparks or flames from the exhaust system.
This is fairly important because most of the fork lifts use propane for fuel. I've seen the devastation caused by a forklift propane tank blowing up. Someone had left one running in an enclosed big garage and went to get coffee at a store. Something sparked and the propane gas had accumulated in the building.
When it blew up the whole shop was damn near leveled.

Answer 2

Someone messed up my boat firing order and when i fired my engine a few times the muffler exploded with a force of a bomb sucked no i have to buy another