heres mine the one nearest to water trap presurises and used as a shut off tap the one underneath regulates the grit flow the one on the side pipe is left fully open unles u get a blockage in the pipe and u can shut it off quick which sends all the presure down through the pot and sometimes clear the blockage also a good whack on the bottom reg valve clears themWhat's the general sequence of fiddling with valves, when trying to get going with a blast pressure pot? Not really sure of how the bypass and the media valve work together, how you get them set right. Is bypass always full open, or .. ?
Cheers.