N.H. Code Admin. R. Env-Or 502.29
“Swivel adaptor” means a device mounted on the fill riser pipe and vapor return riser of a gasoline storage tank that prevents loosening or over-tightening of the adaptor by means of a swivel-type mechanism.
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 (formerly Env-Or 502.31)