Important NFPA Antifreeze System Guideline Changes

Important NFPA Antifreeze System Guideline Changes

As of Oct 1, 2022, NFPA guidelines on antifreeze have changed significantly, and you may need updates to your system to stay up to code! The changes help to keep your property and people safe, and Fire Departments and insurance companies will be enforcing this based on the newest adopted version of NFPA 25, Standard for the Testing, Inspection and Maintenance of Water Based Fire Protection Systems and NFPA 13, Standard for the Installation of Sprinkler Systems.


NFPA Antifreeze System Guideline Changes

Going forward, all new systems and most existing systems with the allowances outlined below must be recharged with UL Listed and approved antifreeze chemical instead of the glycerine/glycol mixtures that have been approved and allowed in the past.


When Do You Need To Update?

Antifreeze systems will need to install the UL Listed antifreeze chemical once the existing system’s glycol or glycerine concentration drops below the functional concentration. This is to prevent freezing or if the concentration tests above 38% for glycerin or 30% propylene glycol by volume.


Once the concentrations test outside of the functional protection (below % by volume) or above the allowable concentration, we will provide a quote for refilling the system with the listed chemical. The new UL listed chemical will have a dye mixed in and come with a specific UL Listed tag that an Authority Having Jurisdiction (AHJ) will use as proof that the proper listed chemical is in the system.


Are there Exceptions?

Code does allow for some exceptions to using the premixed concentrations of glycerine and propylene glycol, though most will need to update. This requires a fire risk assessment to be done per NFPA 551, Guide for the Evaluation of Fire Risk Assessments, to be completed by an approved or designated safety professional. This assessment is usually done by the relevant insurance company and approved by the AHJ/Fire Department the property is located in.


Once the AHJ has signed off that a fire risk assessment is allowable, and the fire risk assessment has been completed, and has proven that installing the pre-mixed glycerine or glycol chemical does not pose a risk to the building or occupants, we can provide a quote and proceed with installation of the pre-mixed PG/glycerine solution.


How Can I Be Sure I’m In Code?

If you want to be certain that you’re within guideline compliance, we’re here to help! Request service here for an inspection and we’ll contact you shortly to schedule a time.


By ensuring your antifreeze system is up to NFPA 25 and NFPA 13 standards, Integrity Fire helps ensure the safety of your people and your property. Reach out today and get started on any testing & inspection. Because It Matters.