Section We 603.03 - Well Casing Extensions(a) If any repair, replacement, or maintenance work is performed on an existing pump or well terminated below the ground surface, and the well does not meet the requirements for terminating the casing below ground surface, as specified in We 602.35, a casing extension shall be installed to raise the casing above the surface of the ground to the height required under We 602.22 and We 602.25.(b) A well casing extension shall be water tight.(c) A well casing extension shall be constructed of the same materials as the existing casing and shall be of sufficient mechanical strength and weight to insure adequate performance of the functions for which casing is used, as specified in We 602.21.(d) Acceptable methods for joining steel casing extensions to existing steel casing shall include the following: (1) Threaded steel coupling;(3) Weld to threaded steel slip coupling; and(4) Mechanical steel bolted restraining pipe coupling.(e) Plastic well casing extensions shall be joined to existing plastic casing by either solvent type or threaded couplings.(f) Plastic well casing extensions shall be schedule 40 or better and in accordance with We 602.06(d)(7).N.H. Admin. Code § We 603.03
#7307, eff 6-13-00; ss by #9179, eff 6-13-08
Amended by Volume XXXVII Number 2, Filed January 12, 2017, Proposed by #12083, Effective 3/1/2017, Expires 3/1/2027.