What does it take to be ASSE 1060-Certified for Freeze Protection Insulated Enclosures?

There are three different classes an enclosure can be placed in, depending upon the amount of protection it provides. If the enclosure is in a climate where winters are long and temperatures are cold, the ASSE 1060 Class 1 will provide the freeze protection needed.

  • Class 1 is the hardest to achieve, but backflow enclosures in this class offer maximum freeze protection. The 1060 standard freeze protection means the heated enclosure will maintain 40 degrees Fahrenheit in as low as -30 degree weather. If you live in an area with freezing temperatures, no matter how long the freeze lasts, you should require Class 1 enclosure.
  • Class 2 only includes covers that have frost protection. This means the industrial enclosure is insulated but does not meet the same temperature requirements as Class 1. These should only be used in areas where temperatures never fall below 33 degrees Fahrenheit.
  • Class 3 boxes do not provide freeze or frost protection. These are only useful for aesthetics as well as theft, vandal and accident protection.


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1. My meter has been locked by Cross Connection (bright colored laminated tag) for non-compliance. How do I get it unlocked?
2. What types of backflow conditions exist?
3. What is Backsiphonage?
4. What factors can cause backsiphonage?
5. What is backpressure?
6. What factors can cause backpressure?
7. What is a cross connection?
8. What is the most common form of a cross connection?
9. What is an Atmospheric Vacuum Breaker (AVB)?
10. Will an Anti-Siphon Vacuum Breaker protect against backpressure?
11. What is continuous pressure?
12. Can an AVB be used under continuous pressure?
13. What is a Hose Bibb Vacuum Breaker (HBVB)?
14. Can I tie my lawn irrigation/sprinkler system to my outside AVB or HBVB?
15. If I have an existing lawn irrigation/sprinkler system do I need a backflow preventer?
16. If I have a new lawn irrigation/sprinkler system do I have to have a separate irrigation meter?
17. When do I need to get a backflow permit? Do I also need a Plumbing Permit?
18. As a homeowner, can I install my own backflow preventer?
19. Do I need a plumbing permit to install a backflow preventer?
20. What if I have a commercial property or I just don’t feel comfortable doing the work myself, who can I hire?
21. How do I become a certified backflow tester in Durham?
22. Are re-certification classes every 2 years necessary?
23. Why can’t we have one universal State backflow testing form for each jurisdiction?
24. What if I want to test backflows outside of Durham?
25. Why do I have to be a properly licensed contractor to test backflows in Durham?
26. How often do I have to test my backflow preventer?
27. What if I have a temporary use that requires a backflow preventer assembly, do I have to get a permit, inspection, etc.?
28. How do I pay for backflow permits, re-inspection fee, CCC Plan Review, Work without permit, CCC Class Enrollment, and any other associated fee with Cross Connection?
29. What does it take to be ASSE 1060-Certified for Freeze Protection Insulated Enclosures?
30. How do I get my meter unlocked?