SCBA Compressor Bauer Junior II - Air Filter Replacement 

Good evening. After changing a filter cartridge, how do i ensure it operates without leaking on the Final pressure valve?

Good afternoon sir, I have a problem, I have a Junior II. After more than 3 years of use, there is a leak in the safety valve, then I think the cartridge filter needs to be replaced. A week later I bought a cartridge filter with part number 057679, but the safety valve was still leaking too. So what's the problem?? Different number of filter cartridges or safety valves sir????