Top Plumbing Certifications for Contractors

Whether you’re just starting your plumbing career as an apprentice or you’re already a licensed master plumber, there are various plumbing certifications that go beyond the general education you’ve received. These certifications allow you to specialize in niche areas of the trade, meet evolving customer demands, and remain competitive in the ever-changing marketplace.

Expanding your expertise with certifications not only boosts your credibility but also opens doors to more specialized services — and higher-paying opportunities. From backflow prevention to green plumbing, keep reading to explore some of the top plumbing certifications professionals like you have used to advance their plumbing careers and stay ahead of the industry.

As a Licensed Plumber, Do I Need Additional Professional Certifications?

As a licensed plumber, you’ve already mastered the essential skills and qualifications to handle most residential and commercial plumbing jobs. However, additional professional certifications can provide you with specialized knowledge that goes beyond the basic requirements of the plumbing trade — especially as the technology used in the sector continues to evolve.

Plumbing certifications position you as an expert, helping you meet the growing demand for specialized services. With advanced credentials, you not only stand out from the competition but also increase your appeal to other plumbing contractors seeking skilled professionals for complex projects. Customers and contractors alike are more inclined to trust a plumber with specialized qualifications, especially for larger, more intricate jobs.

So, while not usually mandatory, additional plumbing certifications can be a powerful tool to grow your career and increase long-term job security. You may be surprised by the wide range of certifications available to plumbing professionals and, through the knowledge of niche services, the variety of unique career paths they can open within the industry. 

Top 5 Plumbing Certifications for Career-Driven Contractors

Investing in certification programs is a key aspect of professional development for plumbing contractors looking to advance their careers. Below we’ve highlighted the top types of plumbing certifications that can enhance your expertise and open new opportunities within the industry.

1. Backflow Prevention Certifications

Backflow prevention is crucial for protecting potable water supplies from harmful contamination. To ensure effectiveness, plumbers can obtain various backflow certifications through the American Society of Sanitary Engineering (ASSE). These certifications not only demonstrate expertise but also enable plumbers to offer specialized services like backflow testing and repair.

Current ASSE backflow prevention certificates, referred to as the ASSE 500 series, include:

• ASSE 5110 Backflow Prevention Assembly Tester
• ASSE 5120 Cross-Connection Control Surveyor/Specialist
• ASSE 5130 Backflow Prevention Assembly Repairer
• ASSE 5140 Fire Protection Cross-Connection Control Tester
• ASSE 5150 Backflow Prevention Program Administrator

Bear in mind that these ASSE certifications will require documented proof of practical experience to qualify. From here, participants will need to complete a 40-hour training course followed by a written exam and demonstration of proper testing procedures. You can use ASSE’s school locator to find a training provider in your area and learn more about schedules and pricing. 

2. Medical Gas Systems Certification

For an even more specialized career track, you may want to consider a medical gas systems certification. This certification sets you apart, allowing you to take on highly technical projects involving the safe installation of medical-grade systems. Plumbers with this certification often work with hospitals, dental clinics, and veterinary offices to install and maintain critical medical gas and vacuum systems.

Like backflow prevention, medical gas certification falls under ASSE jurisdiction and requires plumbers to meet specific qualifications outlined in the ASSE 6000 series. Many plumbers start with the ASSE 6010 Installers Certification and advance to the ASSE 6020 Inspectors or ASSE 6040 Maintenance Personnel Certifications, allowing them to further expand their service offerings.

It's important to note that the ASSE does not directly certify plumbers under the 6000 series standard or provide medical gas training. Rather, plumbers interested in medical gas certification will need to work with a recognized third-party certification agency in their area to obtain these credentials. You can request more information directly through the above ASSE link.

3. Certified Plumbing Design Technician (CPDT)

Developed by the American Society of Plumbing Engineers (ASPE), the Certified Plumbing Design Technician (CPDT) certification is a precursor to the Certified in Plumbing Design (CPD) certification. This credential recognizes up-and-coming professionals who demonstrate strong knowledge and skills in plumbing system design at the technician level.

The CPDT certification is ideal for those looking to establish themselves as a designer of plumbing systems early in their careers. While there are no mandatory courses, candidates must meet strict eligibility requirements, including a bachelor's or associate's degree and/or 2-4 years of plumbing design experience, before taking the 100-question multiple-choice exam.

4. Certified in Plumbing Design (CPD) 

Building on the foundation of the Certified Plumbing Design Technician (CPDT) credential, the Certified in Plumbing Design (CPD) program is the next step for professionals looking to advance their careers as plumbing system designers. Also offered by the American Society of Plumbing Engineers (ASPE), the CPD is the only internationally recognized credential in plumbing engineering, signifying expertise in complex system design.

Like the CPDT, the CPD certification requires candidates to meet specific eligibility requirements for the annual exam, though no formal courses are required. Without certain educational qualifications, professionals may need to demonstrate up to eight years of plumbing design experience to qualify. The CPD is widely regarded as one of the most prestigious certifications in the field, ideal for those committed to a long-term career in plumbing operations.

5. Green Plumbing Design (GPD) 

Taking it a step further, the American Society of Plumbing Engineers also offers the Green Plumbing Design (GPD) certification for professionals holding either a CPD certification or a Professional Engineer (PE) license. This program recognizes expertise in sustainable plumbing, water conservation, and eco-friendly design practices. It features a self-paced online curriculum that covers topics such as solar water heating, pipe insulation, and rainwater harvesting systems.

Although the CPD certification or PE license requirements may seem daunting for emerging professionals, the International Association of Plumbing and Mechanical Officials (IAPMO) offers its own GreenPlumbers program to all plumbers. This program includes a five-part accreditation that focuses on similar sustainability practices within the plumbing industry.

Continue to Grow Your Business with JB Warranties 

In today’s competitive market, acquiring plumbing credentials is your fast track to higher-paying opportunities. As you advance your career, partner with providers who genuinely understand your line of work. At JB Warranties, we offer extended warranty solutions that can help increase revenue for plumbing businesses. Learn more about our solutions today.