{"product_id":"weil-mclain-381-359-305-cga-3-cast-iron-gas-water-boiler-48000-btu-output-spark-ignition-taco-007e-circulator-series-4-natural-gas","title":"Weil-mclain 381-359-305 CGA-3 Cast Iron Gas Water Boiler 48000 Btu Output Spark Ignition Taco 007e Circulator Series 4 Natural Gas","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe Weil-McLain 381-359-305 is the CGA-3 Series 4 cast iron gas-fired hydronic water boiler rated at 48000 BTU output, designed for residential and light commercial heating applications. This boiler runs on natural gas and uses spark ignition for reliable, consistent startup. It ships complete with a Taco 007e circulator, making it a ready-to-install solution for licensed HVAC and plumbing professionals. Cast iron construction gives this boiler exceptional durability and long service life, which is why Weil-McLain backs the heat exchanger with a 20-year warranty and covers parts for 2 years. The CGA-3 operates as a power vent boiler, venting through a 4-inch vent connection, which provides flexible installation options where direct chimney access is not available. The unit draws 67000 BTU input and delivers 48000 BTU output, achieving 84% efficiency. The IBR rating of 49000 BTU and a DOE rating of 56000 BTU confirm solid real-world heating performance. This hydronic boiler operates on a standard 120-volt electrical supply and is approved for installations up to 4500 feet above sea level. The gas connection is 1\/2 inch and the water connection is 1 inch, both standard sizes that simplify integration with existing residential or light commercial piping systems. A 30 psi pressure relief valve is included for safe system operation. The unit measures 52-3\/8 inches tall, 23-1\/4 inches deep, and 10 inches wide, fitting into utility rooms and mechanical spaces where vertical clearance is available. Licensed contractors working on forced hot water heating system replacements or new construction installs will find the CGA-3 Series 4 a dependable, well-supported choice backed by one of the most recognized names in hydronic heating.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e48000 BTU output with 84% efficiency and a 67000 BTU input rating for residential and light commercial hydronic heating\u003c\/li\u003e\n\u003cli\u003eCast iron heat exchanger with a 20-year warranty for long-term durability in hot water boiler applications\u003c\/li\u003e\n\u003cli\u003eIncludes Taco 007e circulator and features spark ignition, power vent design, and a 4-inch vent connection for flexible installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Highlights\u003c\/h4\u003e\u003cp\u003eThe Weil-McLain CGA-3 Series 4 delivers proven cast iron reliability for natural gas hydronic heating systems, arriving circulator-equipped and ready for professional installation in residential and light commercial settings.\u003c\/p\u003e\u003ch3\u003eProduct Information\u003c\/h3\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: WEIL-MCLAIN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 381-359-305\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type\u003c\/strong\u003e: Boiler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoiler Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Type\u003c\/strong\u003e: Hydronic (Water)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Type\u003c\/strong\u003e: Natural Gas\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Type\u003c\/strong\u003e: Spark Ignition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVent Type\u003c\/strong\u003e: Power Vent\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVent Size\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBTU Input\u003c\/strong\u003e: 67000 BTU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBTU Output\u003c\/strong\u003e: 48000 BTU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIBR Rating\u003c\/strong\u003e: 49000 BTU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDOE Rating\u003c\/strong\u003e: 56000 BTU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEfficiency\u003c\/strong\u003e: 84%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 120V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGas Connection\u003c\/strong\u003e: 1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Connection\u003c\/strong\u003e: 1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Relief\u003c\/strong\u003e: 30 psi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Altitude\u003c\/strong\u003e: 4500 feet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 52-3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDepth\u003c\/strong\u003e: 23-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 10 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeatures\u003c\/strong\u003e: Taco 007e Circulator Included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e: 20 Year (Heat Exchanger) \/ 2 Year (Parts)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WEIL-MCLAIN","offers":[{"title":"Default Title","offer_id":51121037410610,"sku":"381-359-305","price":3446.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/304884999.jpg?v=1777746596","url":"https:\/\/voomisupply.com\/products\/weil-mclain-381-359-305-cga-3-cast-iron-gas-water-boiler-48000-btu-output-spark-ignition-taco-007e-circulator-series-4-natural-gas","provider":"Voomi Supply","version":"1.0","type":"link"}