What is the flame arresotrs using in blended Hydrogen engines?

Question

types of flame arrestors

specifications of it

Answer 1

It is to prevent the flame from flashing back into the tank with a big boom.

Answer 2

A simple container of water, with the feed tube from the electrolyser going to the bottom, allowing the gas to bubble up to the top, then continue on to the air intake of the engine. This prevents any backfire from destroying the HHO generator. PVC pipe 2" diameter and 6" long will do the job.