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My Slant prepackaged boiler came preset with the pump pressure at 100lbs (which I verified upon installation) on the Beckett AFG with F4 head. Other boiler manufacturers sell Beckett prepackaged boilers set at 140 lbs. Is there an advantage to be gained from downsizing a given nozzle size and raising the pump pressure? Will the pump have a shorter life at 140lbs as opposed to 100lbs? I would think a higher pump pressure would allow better atomization. Thoughts?