freezemaster™ Antifreeze Blog
In-depth antifreeze and fire safety advice and insights from the experts behind the freeze protection technology like no other.
Have you ever wondered why antifreeze in water-based fire sprinkler systems requires yearly testing before the onset of freezing weather? Simply put, testing ensures that the antifreeze maintains its proper concentration and freeze point. It must always remain in a liquid state and address the life safety issues associated with antifreeze use. To ensure this, the concentration of antifreeze solution should always be no more than the least amount necessary for the anticipated minimum temperature. In the event of leaks, pressure surges or temperature changes to the system, antifreeze can flow out of the system or water can flow into the system, leading to changes in the freeze temperature and antifreeze concentrations. If concentration conditions deviate from allowable tolerances, as illustrated by the chart below for freezemaster™ antifreeze, the fluid must be replaced. Because freezemaster™ antifreeze is a UL-listed, safe to use, factory premixed antifreeze, the percent concentration by volume would always be 100 percent.
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Many are not aware that the National Fire Protection Association (NFPA) fire sprinkler standards require new antifreeze systems to use an agency-listed antifreeze. And these same standards require that existing systems use an agency-listed antifreeze by September 30, 2022. In fact, when safety concerns led to these NFPA updates, no listed product was available.
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Codes, Standards & Approvals | Temperature
NFPA 25 is the standard for the inspection, testing and maintenance of water-based fire protection systems. Once adopted by local code bodies, authorities having jurisdiction (AHJs) require strict adherence to NFPA 25 – and frankly, there is no reason not to design, repair or maintain a system to the standard.
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