Patent ID: 8202331

Claim:
A system for purging unwanted vapors from at least one odorant pump comprising: at least one sight glass to determine when the at least one pump is purged of any unwanted vapors; an odorant accumulator bleed down tank to receive unwanted vapors and purged fluids from the at least one sight glass with visual indicator; an odorant exhaust filter to reduce the concentration of odorant in the vapor when the vapor is periodically vented to atmosphere from the odorant accumulator bleed down tank; a plurality of valves to control the pump purge system; said at least one sight glass having a visual indicator in the sight glass to make it easier to tell when liquid odorant is passing through the sight glass; a nitrogen tank filled with pressurized nitrogen, the nitrogen tank in fluid communication with the odorant accumulator bleed down tank, the pressurized nitrogen periodically forcing accumulated liquid odorant from the odorant accumulator bleed down tank back into a primary odorant storage container; means to control the system for purging unwanted vapors from at least one odorant pump; and a liquid odorant recapture system.