GPD Exam Information and Outline
Green Plumbing Design Certificate
Syllabus Update Checked on: November 10, 2026
GPD Exam Syllabus & Study Guide
Before you start practicing with our exam simulator, it is essential to understand the
official GPD exam objectives. This course outline serves as your roadmap.
The information below reflects the 2026 syllabus defined by
ASPE.
Below are complete topics detail with latest syllabus and course outline, that will help you good knowledge about exam objectives and topics that you have to prepare. These contents are covered in questions and answers pool of exam.
- Exam Format
- Online multiple-choice examination
- Sustainable Design Principles
- Green building rating systems: LEED, WELL, Green Globes
- Codes and standards: IAPMO Green Plumbing and Mechanical Code Supplement, ASHRAE 189.1
- Water Efficiency
- High-efficiency fixtures and flow rates
- Water budgets and demand reduction
- Alternate Water Sources
- Rainwater harvesting and greywater reuse
- Reclaimed water and condensate recovery
- Energy-Efficient Domestic Hot Water
- Heat pump and solar water heating; recirculation systems
- Plumbing System Design for Sustainability
- Pipe sizing and materials; water quality and Legionella risk
- Stormwater Management
- Commissioning, Metering and Life-Cycle Costing