ASSE 5120
Cross-Connection Control Surveyor
Surveys facilities for cross-connections between potable and non-potable systems and determines the protection each hazard requires.
- Cert period
- 3 years
- Recert class
- 8 hrs
- Recert written
- 25 q
- Recert practical
- Yes
Entry requirements
ASSE publishes detailed entry criteria for the 5110 tester credential; for 5120, confirm current entry requirements directly with an ASSE Accredited School.
The three-year clock
Recertification runs every three years through an ASSE Accredited School: a minimum 8-hour class, a 25-question written exam and a hands-on practical. Recertification can be completed up to six months early without losing any certification time, so the professional move is booking early in a slow season rather than gambling a busy one against an expiry date.
Common questions
How often does ASSE 5120 certification renew?
Every three years. Recertification requires a minimum 8-hour class and a 25-question written exam plus a hands-on practical exam, delivered through an ASSE Accredited School. Recertification can be completed up to six months early without losing any certification time.
What does it take to earn ASSE 5120?
ASSE's public page lists detailed entry requirements for the 5110 tester certification; for 5120, confirm current entry requirements with an ASSE Accredited School before enrolling.
Who accepts ASSE 5120?
Acceptance varies by jurisdiction: some water authorities and states require ASSE certification, others recognize additional programs. Confirm with your water authority or state cross-connection control program before enrolling.
The rest of the ladder
| 5110 | Backflow Prevention Assembly Tester |
| 5130 | Backflow Prevention Assembly Repairer |
| 5140 | Fire Sprinkler Cross-Connection Control Tester |
| 5150 | Backflow Prevention Program Administrator |
The three-year clock sheet
One printable page: every 5000-series requirement, the recert timeline counted back from your expiry date, and the kit checklist. Free.
No spam. One useful sheet and occasional certification notes.