Weil-mclain 113-081-468 CGA-8 Cast Iron Gas-fired Water Boiler 172000 Btu Output Spark Ignition with Taco 007 Circulator and Ng to Lp Conversion Kit Series 4 Natural Gas

Product Description

The Weil-McLain 113-081-468 is the CGA-8 Series 4 cast iron, gas-fired hydronic water boiler rated at 172,000 BTU output, designed for residential and light commercial heating applications. This boiler is engineered for licensed HVAC professionals and heating contractors who require a dependable, high-capacity hot water heating system that can handle demanding load requirements across a wide range of building types. The CGA-8 runs on natural gas and comes packaged with a Taco 007 circulator pump and a natural gas to liquid propane conversion kit, giving the installer flexibility to adapt the unit to different fuel supply configurations on the job site. The Series 4 design builds on the proven CGa platform, which spans seven sizes from 38 to 233 MBH output, making it one of the most scalable residential and light commercial hydronic boiler lines available to the trade. Cast iron construction is a hallmark of the CGa Series, offering long service life, excellent heat retention, and resistance to thermal shock that steel alternatives cannot match. The spark ignition system eliminates the need for a standing pilot, improving fuel economy and reducing the risk of nuisance outages. With a BTU input of 233,000 and a DOE heating capacity rating of 198,000 BTU, the CGA-8 delivers strong, consistent performance across heating seasons. The unit operates on 120-volt power, fits standard residential electrical service, and is equipped with a 30 psi pressure relief valve as a primary safety device. Measuring 27.5 inches wide and 35 inches tall, this boiler is sized for mechanical room installations where space planning matters. An annual fuel utilization efficiency rating of 0.84 means a significant portion of input energy is converted to usable heat, keeping operating costs in check for building owners. The gas connection is sized at 3/4 inches, compatible with standard residential and light commercial supply piping. HVAC technicians, plumbers, and heating system installers will find this unit ready for integration into forced hot water systems, zone-controlled hydronic systems, and radiant floor heating setups. Installation, commissioning, and service must be performed by a licensed professional in accordance with all applicable codes and manufacturer guidelines.

• 172,000 BTU output with 233,000 BTU input and a DOE rating of 198,000 BTU for robust hydronic heating capacity
• Cast iron heat exchanger construction provides long service life and superior resistance to thermal shock
• Includes Taco 007 circulator pump and natural gas to liquid propane conversion kit for installation flexibility

Product Highlights

The Weil-McLain CGA-8 Series 4 is a proven cast iron hydronic boiler built for licensed professionals who need a high-output, fuel-flexible heating solution for residential and light commercial installations. Spark ignition, a packaged circulator, and an LP conversion kit make this unit a complete, job-ready heating system.

Product Information

Standard Information

• Brand: WEIL-MCLAIN
• Manufacturer Part Number: 113-081-468

Technical Specifications

• Product Type: Boiler
• Series: CGA Series 4
• Application: Heating
• System Type: Hydronic (Water)
• Fuel Type: Natural Gas
• Ignition Type: Spark Ignition
• BTU Output: 172,000 BTU
• BTU Input: 233,000 BTU
• DOE Heating Capacity: 198,000 BTU
• Efficiency: 0.84 AFUE
• Voltage: 120V
• Gas Connection Size: 3/4 inches
• Pressure Relief: 30 psi
• Width: 27.5 inches
• Height: 35 inches
• Included Accessories: Taco 007 Circulator Pump, NG to LP Conversion Kit