NITC-SealNational Inspection Testing Certification (NITC) is a third-party provider of certification services to the Piping Industry. NITC tests and certifies personnel in the Plumbing, Piping, HVACR and Related Piping Industries. NITC is ISO 9001:2008 certified and offers a large number of personnel certifications that include but are not limited to Journey and Mastery Levels, Medical Gas, IAPMO Voluntary Plumbing and Mechanical Inspector, and assorted City, County and State Government requirements.

About the Medical Gas Certifications

For many years the certification of medical gas systems personnel has been a voluntary effort except where required by an employer or by the local jurisdiction. However, new government and industry requirements continue to emerge asking that medical gas systems personnel document their qualifications through written test and/or practical testing. NITC is the leader in providing medical gas systems personnel certification which meets these needs while holding to the highest standards of modern test practice. NITC’s medical gas systems certification program is nationally recognized and internationally accredited.


Medical Gas Certifications (MGC) offers two paths to certification.  You can either choose to take our online final exam or NITC's proctored exam.  Below is a comparison of the two paths.


* NITC's proctored exams are held at your closest NITC Testing Center.  To locate a testing center near you please go to


MGC fees include access to the training modules, practice exams and online final exam.  If you are intersted in the NITC exam there is an additional fee payable to NITC.  We will provide you with the final exam registration form and additional information on taking the test.

About the Examinations

The Certification Exam will be a closed book with a two (2) hour time limit.  The exam consists of 100 multiple-choice questions and administered by NITC. To locate a testing center near you, or if you have additional questions, please go to

Issuance of Wall Certificates and Cards

Upon successful completion of this certification examination, a certificate and wallet size ID card will be issued. This certification is valid for three (3) years from issuance. Certification holders are responsible for keeping their certification current. NOTE: IN SOME CASES A WALL CERTIFICATE AND/OR WALLET CARD WILL BE ISSUED BY A CITY, COUNTY, STATE, INDUSTRY ASSOCIATION, OR UNION.

Renewal of Certification

This certification is valid for three (3) years from issuance. Renewal of this certification can be accomplished by successfully passing a multiple-choice open book examination within thirty days of the expiration date of certification. This examination contains forty questions which are based on the most current editions of the NFPA 99 and ASSE Series 6000 Standards/Codes.