Weil‑McLain 321811110 – Replacement Section for EG‑40/45 Gas Boiler (Tankless Heater Opening)
This cast iron section is a factory-authorized component for re‑building Weil‑McLain EG‑40 and EG‑45 boilers. It includes a pre‑cut opening to accommodate an OEM tankless domestic water heater coil (e.g., E‑624), supporting direct integration during block assembly :contentReference[oaicite:1]{index=1}.
Key Technical Details Compatibility: Specifically designed for EG‑40 and EG‑45 gas‑fired boilers (Series 1–5)Construction: Cast iron block section, finished to match OEM dimensional tolerancesAdd‑On Capability: Factory‑configured tankless coil opening—not available as a retrofit option post‑purchaseussupply.com +9 weil-mclain.com +9 afsupply.com +9 homeperfect.com +12 afsupply.com +12 ecomfort.com +12???? Installation & Assembly Notes Factory-Installed Block Assembly: Contains complete section assembly with tankless coil opening; cannot be modified in the fieldferguson.com +10 weil-mclain.com +10 homeperfect.com +10Field Reassembly Workflow: Requires joining with adjacent sections using OEM push nipples, gaskets, and tie rods; unit must be pressure-tested per ASME Section IV guidelines before returning to serviceClearance Requirement: Full front access (typically 14″) is necessary for installation and servicing of the tankless coil???? Contractor Considerations Scope: This listing includes a single replacement section only—tie rods, gasket kits, coil accessory components, and jacket/nipple hardware must be procured separately.Pressure Rating: Supports up to 15 PSI steam or equivalent hydronic pressure when assembled correctlyDomestic Coil Integration: To utilize the tankless opening, install an OEM coil (models like E‑624) per the EG‑Series boiler manualCompliance: Full boiler reassembly and system commissioning must adhere to local mechanical codes, ASME standards, and Weil‑McLain instructions???? Summary The Weil‑McLain 321811110 is a purpose-built section replacement for EG‑40/45 boilers, enabling proper integration of a tankless heater opening at the factory or during full block rebuilds. Designed for professional service operations, it ensures proper fit and steam/hydronic integrity in extended boiler assemblies. For standard functionality, choose part 321811115 (without the heater opening)ferguson.com +10 technicalhotandcoldparts.com +10 ecomfort.com +10 afsupply.com +5 thegranitegroup.com +5 plimptonhills.com +5 fwwebb.com +7 plimptonhills.com +7 parts.weil-mclain.com +7 .
Weil‑McLain 321811110 – Replacement Section for EG‑40/45 Gas Boiler (Tankless Heater Opening)
This cast iron section is a factory-authorized component for re‑building Weil‑McLain EG‑40 and EG‑45 boilers. It includes a pre‑cut opening to accommodate an OEM tankless domestic water heater coil (e.g., E‑624), supporting direct integration during block assembly :contentReference[oaicite:1]{index=1}.
Key Technical Details Compatibility: Specifically designed for EG‑40 and EG‑45 gas‑fired boilers (Series 1–5)Construction: Cast iron block section, finished to match OEM dimensional tolerancesAdd‑On Capability: Factory‑configured tankless coil opening—not available as a retrofit option post‑purchaseussupply.com +9 weil-mclain.com +9 afsupply.com +9 homeperfect.com +12 afsupply.com +12 ecomfort.com +12???? Installation & Assembly Notes Factory-Installed Block Assembly: Contains complete section assembly with tankless coil opening; cannot be modified in the fieldferguson.com +10 weil-mclain.com +10 homeperfect.com +10Field Reassembly Workflow: Requires joining with adjacent sections using OEM push nipples, gaskets, and tie rods; unit must be pressure-tested per ASME Section IV guidelines before returning to serviceClearance Requirement: Full front access (typically 14″) is necessary for installation and servicing of the tankless coil???? Contractor Considerations Scope: This listing includes a single replacement section only—tie rods, gasket kits, coil accessory components, and jacket/nipple hardware must be procured separately.Pressure Rating: Supports up to 15 PSI steam or equivalent hydronic pressure when assembled correctlyDomestic Coil Integration: To utilize the tankless opening, install an OEM coil (models like E‑624) per the EG‑Series boiler manualCompliance: Full boiler reassembly and system commissioning must adhere to local mechanical codes, ASME standards, and Weil‑McLain instructions???? Summary The Weil‑McLain 321811110 is a purpose-built section replacement for EG‑40/45 boilers, enabling proper integration of a tankless heater opening at the factory or during full block rebuilds. Designed for professional service operations, it ensures proper fit and steam/hydronic integrity in extended boiler assemblies. For standard functionality, choose part 321811115 (without the heater opening)ferguson.com +10 technicalhotandcoldparts.com +10 ecomfort.com +10 afsupply.com +5 thegranitegroup.com +5 plimptonhills.com +5 fwwebb.com +7 plimptonhills.com +7 parts.weil-mclain.com +7 .
