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The WEIL-MCLAIN 561704357 is a tie bolt designed for use with Baseray 9A cast-iron baseboard heaters in hydronic heating systems. This fastener maintains a tight, leak-resistant connection between cast-iron sections, preserving system integrity under the sustained pressure and temperature cycles typical of residential and light-commercial hot-water heating. Hydronic heating contractors and plumbers install this bolt during section assembly, reassembly after service, or when replacing worn or damaged hardware. At 1.35 inches in height and 0.65 inches in width, it is a compact but critical component for keeping multi-section baseboard assemblies properly clamped and sealed.
The 561704357 tie bolt is used in hydronic baseboard heating installations where Weil-McLain Baseray 9A cast-iron sections are joined together. It is typically needed during new baseboard assembly, field modification of section count, or repair work where original fasteners are corroded or missing. This part is suited for residential and light-commercial applications where cast-iron baseboard radiation is the primary heat-distribution method.
Designed for use with the Weil-McLain Baseray 9A cast-iron baseboard heater. Confirm section model and hardware requirements before ordering.
Installation is performed by licensed plumbers or hydronic heating contractors. Shut down the boiler and relieve system pressure before disassembling or reassembling baseboard sections. Follow the manufacturer's assembly instructions for proper bolt seating and section alignment. Consult local mechanical codes and the International Plumbing Code for hydronic system service requirements.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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