N.H. Code Admin. R. Saf-C 1313.08
A flexible self sealing or a one piece bellows-type pipe, installed between the manifold and muffler, may be used in the exhaust system for expansion and contraction purposes.
Source. #4873, eff 07-24-90; ss by #6297, eff 7-23-96; ss by #8122, INTERIM, eff 7-17-04, EXPIRES: 1-13-05; ss and moved by #8248, eff 1-4-05 (from Saf-C 1312.09); ss by #10439, eff 10-11-13 (See Revision Note at chapter heading for Saf-C 1300); ss by #14005, eff 6-22-24