{"product_id":"2-5-gallon-pail-antifreez-506b-2-24874","title":"Amerex 2.5 Gallon Pail of Antifreez 506B, Single Item - 24874","description":"\u003cbody\u003e\n\n\n\u003cmeta charset=\"UTF-8\"\u003e\n\u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\n\u003ctitle\u003eAmerex 24874 Antifreez 506B Charge | 2.5-Gallon Winterization\u003c\/title\u003e\n\u003cstyle\u003e\n  .product-section { max-width: 100%; margin: 2rem 0; font-family: Arial, sans-serif; color: #333; }\n  .accordion-item { border-bottom: 1px solid #ddd; }\n  .accordion-header { display: flex; justify-content: space-between; padding: 2rem 0; cursor: pointer; background: none; border: none; width: 100%; text-align: left; color: #333; }\n  .accordion-header:hover, .accordion-header:focus { color: #333; background: none; outline: none; }\n  .accordion-title { font-size: 1.5rem; font-weight: 500; }\n  .accordion-icon { font-size: 1.5rem; }\n  .accordion-item.active .accordion-icon { transform: rotate(180deg); }\n  .accordion-content { max-height: 0; overflow: hidden; }\n  .accordion-item.active .accordion-content { max-height: none; }\n  .accordion-content-inner { font-size: 1.4rem; line-height: 1.7; color: #555; padding-bottom: 2rem; }\n  .accordion-content-inner p { margin: 0 0 1rem 0; }\n  .accordion-content-inner ul { margin: 0 0 1rem 0; padding-left: 2rem; }\n  .accordion-content-inner h3 { font-size: 1.4rem; font-weight: 600; color: #333; margin: 1.5rem 0 0.5rem 0; }\n  .specs-table { width: 100%; border-collapse: collapse; }\n  .specs-table th, .specs-table td { border: 1px solid #ddd; padding: 0.75rem 1rem; font-size: 1.4rem; text-align: left; }\n  .specs-table th { background-color: #f5f5f5; font-weight: 600; color: #333; }\n\u003c\/style\u003e\n\n\n\u003cdiv class=\"product-section\"\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\"\u003e\u003cspan class=\"accordion-title\"\u003eProduct Overview\u003c\/span\u003e\u003cspan class=\"accordion-icon\"\u003e⌄\u003c\/span\u003e\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\u003cdiv class=\"accordion-content-inner\"\u003e\n      \u003cp\u003eThe Amerex 24874 Antifreez 506B Charge is the definitive \"winterization solution\" for the Amerex Model 240 (2.5-gallon) stored-pressure water extinguisher. While standard water-based fire suppression is the gold standard for Class A fires, it is fundamentally limited by the laws of thermodynamics. In unheated environments, water-based units are prone to \"Ice-Lock\"—a catastrophic failure where the internal agent freezes and expands, potentially rupturing the stainless steel cylinder or simply preventing a discharge when it is needed most (which is usually when things are already going wrong).\u003c\/p\u003e\n      \u003cp\u003eThe 506B charge (P\/N: 24874) is a precision-engineered chemical additive that provides a critical thermal barrier. When properly mixed, it lowers the freezing point of the fire extinguisher agent to -40°F (-40°C). For fire protection contractors and facility directors overseeing unheated warehouses, the 506B is a mandatory safety component that ensures operational continuity while maintaining the unit's UL listed status and warranty.\u003c\/p\u003e\n\n      \u003ch3\u003eThe Physics of Freezing Point Depression\u003c\/h3\u003e\n      \u003cp\u003eTo provide the technical authority required for industrial safety audits and NFPA 10 inspections, we focus on the molecular dynamics of the Antifreez 506B solution:\u003c\/p\u003e\n      \u003cp\u003e\u003cstrong\u003eSolute-Solvent Interaction:\u003c\/strong\u003e The 506B charge works on the principle of Freezing Point Depression. In pure water, molecules form a rigid crystalline lattice (ice) at 32°F (0°C). By introducing specialized solutes, the chemical interferes with the ability of H2O molecules to align. The 24874 is pre-calibrated to ensure a liquid state down to -40°F.\u003c\/p\u003e\n      \u003cp\u003e\u003cstrong\u003eExpansion Mitigation:\u003c\/strong\u003e Water expands by approximately 9% upon freezing, exerting massive internal pressure on the fire extinguisher valve and siphon tube. The 506B charge ensures volume stability, preventing mechanical distortion of the extinguisher parts.\u003c\/p\u003e\n      \u003cp\u003e\u003cstrong\u003eViscosity and Discharge Velocity:\u003c\/strong\u003e Standard antifreeze can increase fluid viscosity, preventing a 100 psi charge from expelling the agent effectively. The Model 506B maintains low viscosity across its range, ensuring the discharge stream reaches its full 30-to-45-foot potential during fire extinguisher testing.\u003c\/p\u003e\n    \u003c\/div\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\"\u003e\u003cspan class=\"accordion-title\"\u003eTechnical Specifications\u003c\/span\u003e\u003cspan class=\"accordion-icon\"\u003e⌄\u003c\/span\u003e\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\u003cdiv class=\"accordion-content-inner\"\u003e\n      \u003ctable class=\"specs-table\"\u003e\n        \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAmerex Corporation\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e24874 (Model 506B)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e2.5 Gallons (9.46 Liters)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eProtection Level\u003c\/td\u003e\n\u003ctd\u003eDown to -40°F (-40°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eAmerex Model 240 Water Extinguishers\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40°F to 120°F (-40°C to 49°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eUL Listed \/ ULC Listed Component\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eCategory\u003c\/td\u003e\n\u003ctd\u003eFire Protection Safety Equipment\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\"\u003e\u003cspan class=\"accordion-title\"\u003eInstallation and Compliance Protocols (NFPA 10)\u003c\/span\u003e\u003cspan class=\"accordion-icon\"\u003e⌄\u003c\/span\u003e\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\u003cdiv class=\"accordion-content-inner\"\u003e\n      \u003cp\u003eUnder NFPA 10 standards, adding an antifreeze agent is a formal fire extinguisher recharge procedure. Technicians should follow these protocols to maintain a zero-failure network:\u003c\/p\u003e\n      \u003cp\u003e\u003cstrong\u003eExclusive Compatibility:\u003c\/strong\u003e The Model 506B is engineered only for the Amerex Model 240. It is strictly prohibited for use in wet chemical or water mist units, as the chemistry can lead to corrosive reactions or system failure.\u003c\/p\u003e\n      \u003cp\u003e\u003cstrong\u003eThe Decal Mandate:\u003c\/strong\u003e When a unit is winterized, the included 506B charge decal must be applied. This is a critical requirement for a fire marshal inspection, informing users that the unit is rated for low-temperature use.\u003c\/p\u003e\n      \u003cp\u003e\u003cstrong\u003eMixing and Homogeneity:\u003c\/strong\u003e The solution must be thoroughly mixed before the unit is pressurized. If not homogeneous, localized freezing near the siphon tube could block the discharge.\u003c\/p\u003e\n      \u003cp\u003e\u003cstrong\u003ePressure Verification:\u003c\/strong\u003e Once added, the unit must be pressurized to exactly 100 psi. Technicians must verify the pressure gauge is in the \"Green Zone\" during the fire extinguisher inspection.\u003c\/p\u003e\n    \u003c\/div\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"accordion-item\"\u003e\n    \u003cbutton class=\"accordion-header\"\u003e\u003cspan class=\"accordion-title\"\u003eFAQ\u003c\/span\u003e\u003cspan class=\"accordion-icon\"\u003e⌄\u003c\/span\u003e\u003c\/button\u003e\n    \u003cdiv class=\"accordion-content\"\u003e\u003cdiv class=\"accordion-content-inner\"\u003e\n      \u003ch3\u003eCan I use standard automotive antifreeze in my Model 240?\u003c\/h3\u003e\n      \u003cp\u003eNo. This is a major safety violation. Automotive fluids contain silicates that damage internal seals and the fire extinguisher valve. Using non-OEM chemicals voids the fire extinguisher certification and manufacturer warranty.\u003c\/p\u003e\n\n      \u003ch3\u003eHow often should the antifreeze be replaced?\u003c\/h3\u003e\n      \u003cp\u003eDuring the annual fire extinguisher maintenance walkthrough, the solution should be checked for clarity. Most professionals recommend replacing the charge during the 5-year hydrostatic test to ensure maximum potency and protect against corrosive pitting.\u003c\/p\u003e\n\n      \u003ch3\u003eIs this compatible with stainless steel tanks?\u003c\/h3\u003e\n      \u003cp\u003eYes. The Amerex 24874 includes inhibitors that protect high-grade stainless steel and the valve body from oxidation over long-term storage.\u003c\/p\u003e\n    \u003c\/div\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  document.querySelectorAll('.accordion-header').forEach(header =\u003e {\n    header.addEventListener('click', function() {\n      this.parentElement.classList.toggle('active');\n    });\n  });\n});\n\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Amerex 24874 Antifreez 506B Charge | 2.5-Gallon Winterization\",\n  \"description\": \"UL Listed and ULC Listed antifreeze charge for the Amerex Model 240 (2.5-gallon) stored-pressure water extinguisher. Lowers freezing point to -40°F (-40°C). Maintains low viscosity for full discharge velocity. Engineered exclusively for Amerex Model 240 -- not for use in wet chemical or water mist units. Decal must be applied upon winterization. Pressurize to 100 psi after mixing. 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