N.H. Code Admin. R. Env-Or 502.04
“Balance system” means a type of stage II system which relies on a tight seal between the nozzle and the vehicle fill port which causes the displacement and transfer of vapors from a motor vehicle fuel tank into a gasoline storage tank.
Source. (See Revision Note #1 and Revision Note #2 at chapter heading for Env-Or 500) #10229, eff 11-17-12; ss by #13458, eff 10-7-22