2 weeks ago I drained HW tank and flushed repeatedly to remove all the anode rod junk (15x) I installed an anode rod. I also drained bladder tank and installed a new inline cartridge(12") and the water has been great! My shutoffs were somewhat seized from age/gunk? and I loosened the nuts to get the valves to work. Ever since all this I'm picking up air which is present from any faucet when first run? It's not as bad when first purging air after an open system but it annoys me. I have no leaks though? I would think to draw air I would also see a leak somewhere? I have tried "snapping" the relief valve on HW tank too..Puzzled?