ASSE 5110 Backflow Prevention Assembly Tester (ASSE 5110)

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What is the ASSE 5110 Backflow Prevention Assembly Tester (ASSE 5110)?

The **ASSE 5110 Backflow Prevention Assembly Tester** certification is a prestigious professional credential that verifies an individual’s competency in testing and maintaining backflow prevention assemblies. These assemblies are critical components in plumbing and water systems, designed to protect potable water supplies from contamination or pollution due to backflow.

  • Official Exam Name & Acronym: ASSE Series 5000, Standard 5110: Professional Qualifications Standard for Backflow Prevention Assembly Testers (ASSE 5110).
  • Conducting Body/Authority: The exam is administered under the authority of ASSE International (formerly the American Society of Sanitary Engineering), which is now a part of the IAPMO Group (International Association of Plumbing and Mechanical Officials). ASSE International has been a leader in plumbing and mechanical standards since 1906.
  • Purpose of Exam: This is a Professional Certification. It ensures that testers have the technical knowledge and hands-on skills required to verify that backflow assemblies are functioning according to manufacturer specifications and local plumbing codes.
  • Geographic Validity: The ASSE 5110 is the most widely recognized backflow tester certification in North America. It is accepted by the majority of water purveyors and plumbing jurisdictions across the United States and Canada.
  • Level of Competence: This is a Specialist level certification. While it is often pursued by entry-level plumbers or irrigation technicians, passing it demonstrates a high level of technical mastery over specific hydraulic principles and diagnostic procedures.
  • Brief History: The ASSE Series 5000 standards were first developed in 1987 to create a uniform national standard for the plumbing industry. The 5110 standard has evolved through multiple revisions (the most recent being the 2021 edition) to account for new assembly designs and testing technologies.

Who Can Take the ASSE 5110 Backflow Prevention Assembly Tester (ASSE 5110)? (Eligibility Requirements)

To maintain the integrity of the certification, ASSE International mandates specific prerequisites that ensure candidates possess a foundational understanding of the industry before attempting the exam.

  • Academic Requirements: Candidates must possess a High School Diploma or GED equivalent.
  • Experience Requirements: ASSE requires candidates to have a minimum of five (5) years of documented experience in the plumbing, pipefitting, fire protection, water/wastewater, or irrigation industry.
    • Note: Some jurisdictions may allow for a combination of education and experience, but the five-year industry exposure is the standard benchmark for ASSE 5110.
  • Documentation Checklist:
    • Completed ASSE International Certification Application.
    • Proof of experience (employer verification letters or license copies).
    • Government-issued photo ID (Driver’s License or Passport).
    • Verification of completion of an ASSE-approved 40-hour training course.
  • Language Proficiency: While there is no formal IELTS/TOEFL requirement, the exam is conducted in English (and occasionally Spanish in specific regions). Candidates must be able to read technical manuals and record data accurately in English.
  • Background Check Requirements: There is no standard criminal background check required by ASSE, though individual employers or local municipalities may require one for licensing.

Summary Table: ASSE 5110 Eligibility

Requirement Detail
Minimum Education High School Diploma or GED
Work Experience 5 Years in a related piping industry
Mandatory Training 40-Hour ASSE-Approved Course
ID Requirements Valid Government Photo ID
Citizenship No specific nationality requirement

How to Register for the ASSE 5110 Backflow Prevention Assembly Tester (ASSE 5110)

Exam Schedule & Availability

The ASSE 5110 exam is not held on a single national date. Instead, it is offered at the conclusion of **ASSE-approved training programs**. These programs are held on-demand or monthly by various private training providers, vocational schools, and union halls across the country.

Exam Fees (Detailed Breakdown)

Fees are typically split between the training provider (for the 40-hour course) and ASSE International (for the certification and exam processing).

| Total Estimated Cost | $745.00 – $1,115.00 |

Fee Type Estimated Cost (USD)
40-Hour Training Course (Average) $600.00 – $950.00
ASSE Application & Exam Fee $145.00 – $165.00
Retake Fee (Written) $50.00 – $75.00
Retake Fee (Practical) $75.00 – $125.00
Recertification Fee (Every 3 years) $125.00 – $150.00

Booking Process

  1. Find a Provider: Locate an ASSE-approved school or instructor via the ASSE International website.
  2. Enroll in Course: Register for the mandatory 40-hour training course.
  3. Submit Application: Your instructor will usually facilitate the submission of your application and fees to ASSE International.
  4. Practical & Written: The exam is typically administered on the final day of the training course at the provider’s facility.

Retake Policy

If a candidate fails either the written or practical portion:

  • Waiting Period: There is no mandatory federal waiting period, but most providers require at least 24-48 hours before a retake.
  • Attempts: Candidates can retake the exam as needed, but if they fail multiple times, they may be required to retake the 40-hour course.
  • Partial Credit: If you pass the written but fail the practical (or vice-versa), you only need to retake the portion you failed.

Score Validity

The ASSE 5110 certification is valid for three (3) years. To maintain certification, testers must pass a recertification exam (often involving a shorter 8-hour “brush-up” course) before their expiration date.


ASSE 5110 Backflow Prevention Assembly Tester (ASSE 5110) Exam Format & Structure

Exam Format

The exam is a dual-component assessment:

  1. Written Exam: Proctored, typically paper-based or computer-based depending on the provider.
  2. Practical Exam: A hands-on “performance” exam where the candidate must demonstrate the correct testing procedures for four specific assemblies on a “wet lab” test bench.

Timing & Duration

Section Duration Format
Written Examination 2 Hours 100 Multiple Choice Questions
Practical Examination Varies (approx. 1-2 hours) Hands-on demonstration

Syllabus & Content Domains

The written exam covers theoretical knowledge, while the practical covers the execution of the ASSE 5000 field test procedures.

Domain Topics Covered Weightage
Hydraulic Principles Backsiphonage, Backpressure, Atmospheric Pressure 20%
Assembly Components Check valves, relief valves, air inlets, shut-off valves 20%
Testing Procedures Step-by-step diagnostic procedures for RP, DC, PVB, SVB 40%
Codes & Safety Safety protocols, reporting, local and national plumbing codes 20%

How is the ASSE 5110 Backflow Prevention Assembly Tester (ASSE 5110) Scored?

Passing Score

  • Written Exam: Candidates must achieve a minimum score of 70%.
  • Practical Exam: This is a Pass/Fail component. Candidates must perform the field test procedures for all four assembly types with 100% accuracy in following the mandatory steps. A single critical error results in a failure of that assembly test.

Scoring Mechanics

  • Negative Marking: None. You are encouraged to answer every question.
  • Partial Credit: No partial credit is given on the written exam. In the practical exam, if you make a non-critical error, the proctor may allow you to restart the test for that specific assembly once.
  • Result Declaration: Preliminary results for the practical are usually known immediately. Official written results and the physical certification card typically arrive via mail within 4 to 6 weeks.

How Difficult is the ASSE 5110 Backflow Prevention Assembly Tester (ASSE 5110)?

Difficulty Assessment

The exam is considered Challenging. While the written portion is manageable for those who study the manual, the practical exam is high-pressure. Testers must memorize specific sequences of opening and closing valves and reading gauges; forgetting one step can mean failure.

Historical Pass Rates

While ASSE does not publish annual pass rates, industry data from major training providers suggests:

Category Estimated Pass Rate
First-time Pass Rate (Combined) 75%
Written Exam Pass Rate 85%
Practical Exam Pass Rate 70%

ASSE 5110 vs. Similar Certifications

Comparison Table

Feature ASSE 5110 AWWA C511 ABPA
Authority ASSE International American Water Works Association American Backflow Prevention Assoc.
Recognition Widest (National) Strong in specific states (e.g., CA, TX) Highly respected (National)
Prerequisites 5 Years Experience Varies by section None (General)
Exam Focus Hands-on/Standardized Water utility focus Diagnostic focus

How to Prepare for the ASSE 5110 Backflow Prevention Assembly Tester (ASSE 5110)

Recommended Study Timeline

  • Weeks 1-2: Read the ASSE Series 5000 Standard and the Backflow Prevention Assembly Testing Manual. Focus on hydraulic theory.
  • Weeks 3-4: Attend the mandatory 40-hour course. Use the hands-on lab time to practice the “muscle memory” of the testing steps.
  • Final Days: Memorize the “failure criteria” for each assembly (e.g., when a check valve is considered “leaking” vs. “tight”).

Best Study Resources

  • Official Manual: ASSE Series 5000: Cross-Connection Control Professional Qualifications Standard.
  • Reference Book: Manual of Cross-Connection Control (University of Southern California – FCCCHR).
  • Apps/Videos: YouTube channels like “Backflow Direct” offer visual walkthroughs of the practical tests.

What to Expect on ASSE 5110 Exam Day

  • Check-in: Arrive 30 minutes early with your photo ID.
  • The Written Test: You will be given a test booklet and a Scantron or digital interface. No outside reference materials are allowed.
  • The Practical Test: You will be assigned a test station with a Reduced Pressure Principle (RP) assembly, a Double Check Valve (DC) assembly, a Pressure Vacuum Breaker (PVB), and a Spill-Resistant Vacuum Breaker (SVB).
  • Tools: You must bring or be provided with a calibrated differential pressure gauge (3-valve or 5-valve).

After Passing the ASSE 5110 Backflow Prevention Assembly Tester (ASSE 5110)

Once you pass, you are officially an **ASSE Certified Backflow Prevention Assembly Tester**.

  • Licensing: You must submit your ASSE certificate to your local city or water purveyor to be added to their “Registered Testers” list.
  • Career Opportunities: Certified testers can work for municipal water departments, fire protection companies, plumbing contractors, or start their own independent testing business.
  • Average Salary: Certified testers often earn 15-25% more than non-certified plumbing technicians, with specialized testers earning between $55,000 and $85,000 annually depending on the region.

Frequently Asked Questions (FAQ)

  1. How long does the ASSE 5110 certification last? It is valid for three years.
  2. Can I test fire sprinkler backflow with ASSE 5110? In many jurisdictions, yes, though some states require an additional Fire Sprinkler Tester license.
  3. What happens if my certification expires? You generally have a short grace period (6 months) to take a recertification class, otherwise, you must retake the full 40-hour course.
  4. Is the USC manual the same as the ASSE standard? No. While they cover similar physics, the specific testing procedures (the steps taken) can differ slightly. ASSE 5110 tests you specifically on the ASSE procedures.
  5. Do I need to own my own gauge to take the test? Most schools provide gauges, but it is highly recommended to use the gauge you plan on working with.
  6. What is a “critical error” in the practical exam? Examples include failing to bleed the test cocks, recording the wrong value, or creating a backflow condition during the test.
  7. Is there a limit on how many times I can retake the exam? ASSE doesn’t set a hard limit, but individual schools may charge for each attempt.
  8. Does ASSE 5110 cover repair? No, 5110 is for testing. ASSE 5130 is the standard for Repairers.
  9. Can I use a digital gauge? Yes, as long as it is a differential pressure gauge and has been calibrated within the last 12 months.
  10. Is this certification recognized in Canada? Yes, ASSE 5110 is widely accepted across Canadian provinces.

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