ISO 9001:2015 Certified   |  877.457.6482   |  Twitter  LinkedIn

STAR Plumbing Mastery

  • The initial cost for this certification is $150.00.
  • Candidates must score a minimum of 79.4% to pass.
  • Candidates can re-take the exam if they fail for an additional $150.00 fee.
  • This certification is valid for five (5) years from issuance.
  • Recertification of this certification can be accomplished by successfully passing a fifty (50) question, non-proctored, multiple choice “open book” examination within thirty days of the expiration date of certification. Candidates must answer thirty-seven of the questions (74%) correctly on the exam to achieve a passing grade. 

Effective July 1, 2020, STAR Mastery Examinations will only be administered by computer.


A STAR Plumbing Mastery certification candidate is a qualified individual who can demonstrate mastery of the trade and will be skilled and experienced in the design, installation, maintaining, servicing, and repairing water systems; drainage, waste, and vent systems; storm water systems; fuel gas systems; water heating systems; and specialty systems, utilizing knowledge of national, state, and local plumbing codes to protect the health and welfare of the general public.

A qualified plumber may perform these tasks alone, or through the supervision of other individuals.

It is expected that the STAR Plumbing Mastery examination candidate is a plumber who has completed a UA training program or equivalent, and/or has five years of experience in the industry.

To Qualify

  • Candidates must provide five (5) years of documented work experience installing and servicing of plumbing systems or provide documentation of being in the fifth (5th) year of a plumbing training program involving the installation and servicing of plumbing systems.

Application and Examination Request Forms

Submit Application Online (PSI ONLY)

Locate a Prometric Test Center

You will need your Eligibility ID to schedule your exam. This will be provided to you in your approval email.   To locate a Prometric Center near you Click Here.