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The PARTS TO YOUR DOOR 51546 is a 6 inch push nipple designed to connect cast iron boiler sections in hydronic heating systems. Push nipples serve as the internal coupling between individual boiler sections, maintaining a sealed fluid passage as sections are drawn together during assembly. This part is installed by licensed plumbers and heating contractors during boiler assembly, section replacement, or system repair. Proper seating of the nipple is critical to system integrity and long-term leak-free operation.
This push nipple is compatible with PB Heat boiler models 60, 63, 64, and JO 210. It is typically used in residential and light commercial hydronic heating applications where cast iron sectional boilers are the primary heat source. Replacement of push nipples is most common during section repair or when a failed seal has caused system leakage between boiler sections.
Designed for use with PB Heat boiler models 60, 63, 64, and JO 210. Consult the boiler manufacturer documentation to confirm section push nipple sizing before installation.
Installation should be performed by a licensed plumber or heating contractor. Shut down the boiler, allow the system to cool, and relieve system pressure before disassembling boiler sections or replacing push nipples. Push nipples must be fully seated and sections properly drawn together using boiler rod hardware to ensure a leak-free joint. Follow local mechanical codes and the boiler manufacturer assembly instructions throughout the process.
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