{"title":"Weil-McLain","description":"\u003cdiv style=\"font-family: Arial, sans-serif; font-size: 15px; color: #333333; line-height: 1.6;\"\u003e\n\u003cp\u003e\u003cspan\u003eIndustry-leading commercial gas and oil-fired boilers, cast-iron boiler sections, and OEM replacement parts from Weil-McLain. Engineered for maximum thermal efficiency in large-scale facilities.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"wm-lgb-5","title":"Weil-McLain LGB-5 Cast Iron Gas Boiler","description":"\u003cdiv style=\"font-family: Arial, sans-serif; font-size: 15px; color: #333333; line-height: 1.6;\"\u003e\n  \u003cp\u003e\n    The \u003cstrong\u003eWeil-McLain® LGB Series 5\u003c\/strong\u003e is a high-capacity, atmospheric-vented cast iron sectional gas boiler engineered to deliver rugged, dependable low-pressure hot water or steam heating across light-to-medium commercial architectures. Formed from high-grade, precision-cast iron sections that retain their tough natural outer skin, the LGB-5 offers superior structural resistance against scaling and fireside corrosion while acting as a massive thermal reservoir for demanding building distribution loops.\n  \u003c\/p\u003e\n  \u003cp style=\"margin-top: 15px;\"\u003e\n    By featuring high-performance aluminized steel burners and a compact mechanical design, this series facilitates straightforward installation in space-constrained mechanical rooms, allowing individual sections to navigate easily through standard doorways for on-site knockdown assembly. Watertight port seals are achieved using modern flexible elastomer sealing rings that cleanly accommodate structural expansion and contraction cycles, working alongside straightforward mechanical controls to ensure continuous operational uptime without the vulnerabilities of intricate microcircuit components.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Weil-McLain","offers":[{"title":"Default Title","offer_id":42839826104414,"sku":"WM-LGB-5","price":14800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/weil-mclain-lgb-series-commercial-gas-boiler.png?v=1781146641"},{"product_id":"wm-lgb-6","title":"Weil-McLain LGB-6 Cast Iron Gas Boiler","description":"\u003cdiv style=\"font-family: Arial, sans-serif; font-size: 15px; color: #333333; line-height: 1.6;\"\u003e\n  \u003cp\u003e\n    The \u003cstrong\u003eWeil-McLain® LGB Series 6\u003c\/strong\u003e is a commercial-grade, atmospheric-vented cast iron sectional gas boiler engineered to supply dependable, low-pressure hot water or steam heating across light-to-medium commercial facility plants. Built with premium, precision-cast iron sections and durable sealing rings, the LGB-6 provides long-term corrosion resistance, excellent structural thermal retention, and a classic robust footprint that easily absorbs the stress of large hydronic distribution loops.\n  \u003c\/p\u003e\n  \u003cp style=\"margin-top: 15px;\"\u003e\n    Featuring high-efficiency aluminized steel burners and a clean, low-profile layout, this boiler is designed for space-constrained mechanical rooms, allowing individual sections to be maneuvered through standard commercial door frames for simple on-site block assembly. Its high-grade cast iron construction acts as a highly reliable heat reservoir, delivering quiet thermal distribution, low stack temperatures, and straightforward mechanical controls that remove the vulnerabilities of complex modern electronic diagnostic arrays.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Weil-McLain","offers":[{"title":"Default Title","offer_id":42839826137182,"sku":"WM-LGB-6","price":17130.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/weil-mclain-lgb-series-commercial-gas-boiler.png?v=1781146641"},{"product_id":"weil-mclain-511724951","title":"Weil-McLain Ultra Boiler Control Module - 511724951","description":"\u003cdiv class=\"product-description-wrapper\" style=\"font-family: Arial, sans-serif; line-height: 1.6; color: #333; margin-bottom: 25px;\"\u003e\n  \u003cp style=\"margin-bottom: 16px;\"\u003e\n    The \u003cstrong\u003eWeil-McLain® Ultra U-Control™ Module (MPN: 511-724-951 \/ 383-500-658)\u003c\/strong\u003e is the factory-authorized brain assembly engineered to restore precision ignition sequencing and thermal safety across Ultra Series gas-fired condensing boilers. This advanced microprocessing control network actively manages system logic parameters, responding instantaneously to field signals from the room thermostat, low-water cutoff (LWCO), and air pressure switches.\n  \u003c\/p\u003e\n\n  \u003cp style=\"margin-bottom: 12px;\"\u003e\u003cstrong style=\"font-size: 15px; color: #111;\"\u003eKey Performance Features:\u003c\/strong\u003e\u003c\/p\u003e\n  \u003cul style=\"margin-top: 0; margin-bottom: 20px; padding-left: 20px;\"\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eDynamic System Regulation:\u003c\/strong\u003e Controls the full boiler lifecycle—modulating gas valve timing, proving pilot flame integrity within a 15-second trial window, and commanding purging cycles to optimize efficiency.\n    \u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eMulti-Circulator Coordination:\u003c\/strong\u003e Intelligently sequences system circulators, primary boiler pumps, and dedicated domestic hot water (DHW) loops simultaneously.\n    \u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eRobust Electrical Protection:\u003c\/strong\u003e Designed with clean external fuse terminal channels to protect the underlying motherboard tracks against external field wiring spikes.\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp style=\"margin-top: 16px; margin-bottom: 0;\"\u003e\n    \u003cstrong\u003eCompatibility Note:\u003c\/strong\u003e This genuine OEM replacement part is specifically optimized for seamless electrical integration into Weil-McLain Ultra Series 3, Series 4, and Series 1 Commercial high-efficiency boiler systems.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Weil-McLain","offers":[{"title":"Default Title","offer_id":42910006214750,"sku":"511724951","price":425.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Weil-McLain_Ultra_series_boiler_U-control_module_circuit_board_layout_displaying_clean_integrated_multi-pin_wire_harness_terminals_and_protective_housing_container..jpg?v=1782083409"},{"product_id":"weil-mclain-510312000","title":"Weil-McLain CGa\/EG Boiler Spark Igniter \u0026 Sensor - 510312000","description":"\u003cdiv class=\"product-description-wrapper\" style=\"font-family: sans-serif; line-height: 1.6; color: #333; margin-bottom: 25px;\"\u003e\n  \u003cp style=\"margin-bottom: 16px;\"\u003e\n    The Weil-McLain 510312000 is a genuine OEM combination spark igniter and flame sensor assembly engineered specifically for CGa and EG atmospheric gas boiler series. This factory-authorized replacement component is critical for orchestrating safe, reliable intermittent pilot burner lighting cycles, ensuring efficient thermal delivery while preventing dangerous unburned gas buildup.\n  \u003c\/p\u003e\n\n  \u003cp style=\"margin-bottom: 12px;\"\u003e\u003cstrong style=\"font-size: 15px; color: #111;\"\u003eSafety Engineering \u0026amp; Flame Detection Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n  \n  \u003cul style=\"margin-top: 0; margin-bottom: 20px; padding-left: 20px;\"\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eDual-Function Assembly Precision:\u003c\/strong\u003e Consolidates both the high-voltage spark ignition electrode and the responsive flame ionization detection rod onto a single, heavy-gauge steel mounting bracket framework.\n    \u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eHigh-Temperature Ceramic Insulation:\u003c\/strong\u003e Outfitted with industrial-tier glazed ceramic sleeves that protect the electrical pathways, preventing short-circuiting and structural grounding issues caused by extreme combustion chamber temperatures.\n    \u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eInstant System Safety Proving:\u003c\/strong\u003e Relays microamp flame rectification signals back to the main ignition control board within milliseconds, ensuring immediate fuel shut-off if an unexpected flame cutout occurs.\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp style=\"margin-top: 16px; margin-bottom: 0;\"\u003e\n    \u003cstrong\u003eService Note:\u003c\/strong\u003e Over time, carbon fouling, oxidation, and microscopic ceramic cracking can cause hard-starting or false lockout codes (such as flashing lockout lights or ignition retry failures). Replacing the probe maintains quick, clean lighting sequences and dependable winter runtime behavior.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Weil-McLain","offers":[{"title":"Default Title","offer_id":42910006313054,"sku":"510312000","price":120.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/An_angled_professional_studio_shot_from_image_8e821b.jpg_of_a_boiler_replacement_igniter_and_sensor_rod_highlighting_its_elongated_white_glazed_ceramic_insulator_body_a_stamped_metal_mounting_flange_with_an_integrated_gasket_and_bent_silver_m.jpg?v=1782144231"},{"product_id":"weil-mclain-510811005","title":"Weil-McLain GV90+ Gas Boiler Combustion Blower - 510811005","description":"\u003cdiv class=\"product-description-wrapper\" style=\"font-family: sans-serif; line-height: 1.6; color: #333; margin-bottom: 25px;\"\u003e\n  \u003cp style=\"margin-bottom: 16px;\"\u003e\n    The Weil-McLain 510811005 is a factory-authorized premium induced-draft combustion blower assembly precision-engineered for the high-efficiency GV90+ gas boiler series. Tasked with maintaining safe internal static pressures, this blower forces pre-mixed air and gas smoothly through the burner matrix while simultaneously exhausting spent combustion byproducts outward through the boiler's positive-pressure vent lines.\n  \u003c\/p\u003e\n\n  \u003cp style=\"margin-bottom: 12px;\"\u003e\u003cstrong style=\"font-size: 15px; color: #111;\"\u003eAdvanced Airflow Dynamics \u0026amp; Performance Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n  \n  \u003cul style=\"margin-top: 0; margin-bottom: 20px; padding-left: 20px;\"\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eOptimized Combustion Efficiency:\u003c\/strong\u003e Features a dynamically balanced, tight-tolerance internal blower wheel that maintains consistent volumetric airflow (CFM), guaranteeing optimal fuel-to-oxygen ratios to prevent soot production or flame instability.\n    \u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eHeavy-Duty Thermal Resilience:\u003c\/strong\u003e Outfitted with a premium single-phase PSC motor shielded by a rugged, vibration-dampening housing designed to effortlessly endure the continuous, high-temperature operational demands of centralized hydronic systems.\n    \u003c\/li\u003e\n    \u003cli style=\"margin-bottom: 10px;\"\u003e\n      \u003cstrong\u003eSeamless Control Integration:\u003c\/strong\u003e Connects directly to the main boiler control module, ensuring rapid modulation and precise prepurge\/postpurge cycles during standard mechanical heating demands.\n    \u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp style=\"margin-top: 16px; margin-bottom: 0;\"\u003e\n    \u003cstrong\u003eInstallation Requirement Note:\u003c\/strong\u003e This assembly is strictly designed as an original equipment manufacturer (OEM) direct replacement part. Replacing an unstable or whining draft inducer restores quiet operational thresholds and prevents systemic safety lockouts triggered by the flue pressure switch network.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Weil-McLain","offers":[{"title":"Default Title","offer_id":42910017683550,"sku":"510811005","price":565.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/An_angled_professional_studio_shot_from_image_8e2007.jpg_of_a_Weil-McLain_combustion_blower_kit_showcasing_the_cast-aluminum_fan_scroll_body_integrated_black_cylindrical_motor_top-block_and_the_rectangular_exhaust_flue_flange_port_alongside_a.jpg?v=1782143691"},{"product_id":"weil-mclain-633500001","title":"Weil-McLain Aqua Plus 45 Indirect-Fired Water Heater (Series 2)","description":"\u003cdiv style=\"font-family: Arial, sans-serif; font-size: 15px; color: #333333; line-height: 1.6;\"\u003e\n  \u003cp\u003e\n    The \u003cstrong\u003eWeil-McLain Aqua Plus 45 Indirect-Fired Water Heater (Series 2)\u003c\/strong\u003e is a high-performance system component engineered to deliver premium domestic hot water efficiency and reliability. Built with a heavy-duty 316L stainless steel tank and high-output internal coil design, this unit provides exceptional durability and outstanding resistance to demanding, aggressive water environments. Its low-maintenance, high-performance architecture eliminates the need for a sacrificial anode rod, making it an ideal solution for residential and light commercial hydronic heating loops.\n  \u003c\/p\u003e\n  \u003cp style=\"margin-top: 15px;\"\u003e\n    Operating seamlessly as an independent zone connected directly to your primary heating boiler, the Aqua Plus 45 generates ultra-fast recovery times and continuous hot water delivery by utilizing a tightly wound 1-inch diameter heat exchanger coil. The tank features a high-density, 2-inch thick CFC-free foam insulation jacket that reduces standby heat losses down to an exceptional 0.4°F per hour, maximizing overall fuel conservation. Encased in a resilient, dent-resistant pewter gray polymer resin outer shell, this indirect water heater provides long-lasting mechanical protection and reliable domestic thermal staging.\n  \u003c\/p\u003e\n\n  \u003c!-- Advanced Engineering Features Bullets --\u003e\n  \u003cdiv style=\"margin-top: 25px; margin-bottom: 20px;\"\u003e\n    \u003ch4 style=\"font-size: 16px; font-weight: bold; margin-bottom: 10px; color: #111111; border-bottom: 2px solid #111111; padding-bottom: 5px;\"\u003eAdvanced Engineering Features:\u003c\/h4\u003e\n    \u003cul style=\"margin: 0; padding-left: 20px; font-size: 14px; color: #333333; line-height: 1.6;\"\u003e\n      \u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003ePremium 316L Stainless Steel Architecture:\u003c\/strong\u003e Advanced plasma and TIG-welded tank geometry provides total corrosion defense across harsh water applications without sacrificial rods.\u003c\/li\u003e\n      \u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eHigh-Output 1\" Internal Coil:\u003c\/strong\u003e Generates excellent first-hour flow delivery with a remarkably low pressure drop on the boiler-side distribution loop.\u003c\/li\u003e\n      \u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eIntegrated Digital Thermostat:\u003c\/strong\u003e Features a factory-installed precision immersion sensor probe for simple, rapid low-voltage control panel wiring.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Weil-McLain","offers":[{"title":"Default Title","offer_id":42910017781854,"sku":"633500001","price":2200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Weil-McLain_Aqua_Plus_45_vertical_indirect-fired_stainless_steel_domestic_water_heater_tank_in_pewter_gray..jpg?v=1782004393"},{"product_id":"wm-ultra-series","title":"Weil-McLain Ultra Series High-Efficiency Gas Boiler","description":"\u003cdiv style=\"font-family: Arial, sans-serif; font-size: 15px; color: #333333; line-height: 1.6;\"\u003e\n  \u003cp\u003e\n    The \u003cstrong\u003eWeil-McLain Ultra Series High-Efficiency Gas Boiler\u003c\/strong\u003e is a high-performance boiler part engineered to deliver premium hydronic efficiency and reliability. Built with a heavy-duty cast aluminum housing, this unit provides exceptional durability and outstanding resistance to demanding system environments. Its low-maintenance, high-performance architecture makes it an ideal solution for residential, commercial, and industrial hydronic application loops.\n  \u003c\/p\u003e\n  \u003cp style=\"margin-top: 15px;\"\u003e\n    Engineered as the centerpiece of advanced low-temperature condensing hydronic systems, the Ultra Series leverages state-of-the-art modulating burner configurations to eliminate short-cycling and lower fuel utility rates by up to 30%. The integration of an UltraArmor protective thermal block structure defends core passageways from corrosion and debris accumulation, sustaining high operational efficiency year after year. Equipped with intuitive multi-zone digital controls and outdoor temperature monitoring interfaces, this condensing system smoothly matches heat production to ambient load demands for uniform climate control.\n  \u003c\/p\u003e\n\n  \u003c!-- Advanced Engineering Features Bullets --\u003e\n  \u003cdiv style=\"margin-top: 25px; margin-bottom: 20px;\"\u003e\n    \u003ch4 style=\"font-size: 16px; font-weight: bold; margin-bottom: 10px; color: #111111; border-bottom: 2px solid #111111; padding-bottom: 5px;\"\u003eAdvanced Engineering Features:\u003c\/h4\u003e\n    \u003cul style=\"margin: 0; padding-left: 20px; font-size: 14px; color: #333333; line-height: 1.6;\"\u003e\n      \u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eUltraArmor Nanotechnology Coating:\u003c\/strong\u003e Premium protective internal shielding acts as a barrier against scaling and harsh thermal cycling stresses to secure heat exchanger longevity.\u003c\/li\u003e\n      \u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003e5:1 Proportional Modulation Turn-Down:\u003c\/strong\u003e Advanced gas valve and variable-speed blower automatically scale performance down to 20% capacity to accurately fulfill small zone demands without wasting energy.\u003c\/li\u003e\n      \u003cli style=\"margin-bottom: 8px;\"\u003e\n\u003cstrong\u003eU-Control Intelligent Logic Board:\u003c\/strong\u003e Comprehensive multi-circulator management screen monitors internal sensors and outdoor profiles, operating up to three unique temperature setpoints simultaneously.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Weil-McLain","offers":[{"title":"Default Title","offer_id":43050609082462,"sku":"383-500-732","price":3742.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/Weil-McLain_Ultra_Series_high_efficiency_condensing_gas_water_boiler_with_a_fully_removable_grey_front_access_jacket_assembly..jpg?v=1782003884"}],"url":"https:\/\/nationalboilersupply.com\/collections\/weil-mclain.oembed","provider":"National Boiler Supply","version":"1.0","type":"link"}