Although this post was from a old topic I thought I would share my mod for this cheap knock off unit. I looked and looked for a breather to fit to no avail....so I cut the top off, and made a new one out of 16 gauge steel but it needed to be 1/4" thick for the grommet, so I made a washer, tacked and welded the new top back on.....I ended up painting the top black and added the new breather cap. For the price it seemed well built and with this mod made it functional