
To be eligible to take the CPDT exam, you must have one of the following:
- Bachelor’s degree in engineering with one year of experience designing plumbing systems
- Associate’s or bachelor’s degree in a field related to engineering (physics, mathematics, architecture, civil, environmental studies, construction, HVAC, etc.) and a minimum of two years of experience designing plumbing systems
- Four years minimum of plumbing design experience
ASPE members who are in the Full or Associate member categories are automatically eligible to sit for the exam. Others must complete the eligibility form prior to submitting exam registration fees.
The cost to take the exam is $225 for ASPE members and $450 for nonmembers. Not an ASPE member? Join today to save on the CPDT exam fee and take advantage of all of ASPE’s member benefits.
Exam registration for eligible candidates is open at ASPE Education until October 5, 2026.
What Is the CPDT Credential?
ASPE developed the CPDT credential to provide professional recognition of qualified plumbing designers early in their careers, and it is considered the first step toward ASPE’s CPD (Certified in Plumbing Design) credential. ASPE encourages all CPDTs to continue their education and work toward a CPD designation.