Annual Testing of Antifreeze Loop
Our technician will take a small sample from multiple locations on the system piping and test the specific gravity of the solution to determine the effective freeze and burst points. Existing NFPA13D systems (systems installed before September 30, 2012) must be tested annually by a qualified individual. NFPA 13D provides two alternative test procedures. In the first alternative, the system is drained and two solution samples are taken, one near the beginning and one near the end of the draining process. In the second alternative, the system is not drained and two solution samples are taken, one at the highest practical elevation and one at the lowest practical elevation of the system.
Following the annual test, a tag must be attached to the riser indicating the date of the last test, he type and concentration of antifreeze solution, the date the antifreeze was replaced (if applicable), a statement indicating if the entire system was drained and replaced with antifreeze and a notice to test the concentration of the solution at yearly intervals per NFPA 13D.