ASSE 5110 Backflow Tester Pass Rate, Format & Study Guide

The ASSE 5110 written examination has 100 multiple-choice questions and a 120-minute time limit, and the minimum passing score is 70 percent (ASSE 5110 candidate handbook, revision 9/17/2026). Certification also requires a separate hands-on practical on ASSE 1013, 1015, 1020 and 1056 assemblies, which this portal does not simulate. This portal's practice set has 100 written-style questions across six content areas.

ASSE 5110 certification shows you are qualified to test backflow prevention assemblies, which many water suppliers and local authorities require before they accept your test reports.

Plumbers, irrigation and water-system technicians and cross-connection control staff preparing for ASSE 5110 certification, and candidates retesting after a failed attempt.

The certifying body does not publicly publish an official pass rate for this exam. Be wary of third-party sites citing a specific number here — treat any pass-rate claim you see elsewhere for this exam as unverified.

After a failed written or practical exam you may retest through an ASSE-approved school after at least 24 hours. A retest class application must reach ASSE at least two weeks before the retest date, the written retest fee equals the first written fee, and the retest must happen within six months of the failure. After three unsuccessful attempts of the same kind additional steps apply.

The written examination is passed with a score of 70 percent or higher, and the practical is a separate pass/fail requirement. You need both to earn the certification. Format: 100 multiple-choice written questions in 120 minutes; the hands-on practical is separate. No official pass rate is available for this exam, so none is quoted here.

The ASSE 5110 written examination has 100 multiple-choice questions and a 120-minute time limit, and the minimum passing score is 70 percent (ASSE 5110 candidate handbook, revision 9/17/2026). Certification also requires a separate hands-on practical on ASSE 1013, 1015, 1020 and 1056 assemblies, which this portal does not simulate. This portal's practice set has 100 written-style questions across six content areas. 100 multiple-choice written questions · 120 minutes · pass: 70 percent · plus a separate pass/fail hands-on practical on four assembly types. The written examination is passed with a score of 70 percent or higher, and the practical is a separate pass/fail requirement. You need both to earn the certification.

• Terminology15%
• Basic Hydraulics15%
• Assemblies, Devices and Methods25%
• Test Equipment and Testing15%
• Procedures15%
• Troubleshooting15%

The content outline spreads questions across 6 areas: Terminology (15.0%); Basic Hydraulics (15.0%); Assemblies, Devices and Methods (25.0%); Test Equipment and Testing (15.0%); Procedures (15.0%); Troubleshooting (15.0%).

Applicants must have a minimum of five years of documented practical experience, complete a minimum 40-hour training course from an ASSE-approved school, pass the 100-question exam with 70% or higher, pass a practical exam using the required assemblies, and attest to ASSE's Code of Professional Conduct. You apply during the training course, and ASSE confirms eligibility before authorizing the exam.

No fee is quoted: ASSE publishes its examination fee on its website, the approved school collects it, and schools set their own training prices.

ASSE certification is valid for three years and must be renewed before it expires; recertification and continuing compliance requirements are described in the handbook.

Start with the heaviest areas of the content outline: Assemblies, Devices and Methods (25.0%); Terminology (15.0%); Basic Hydraulics (15.0%). Then work through the remaining areas, and finish with timed full-length practice runs of 100 questions in one sitting.

Content outlines, fees and passing standards change; this guide follows the materials listed under Verification as of October 2026. Check ASSE International and your approved school before you register.