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The B38;K LLC 102-054HN is a 3/4-inch boiler drain valve designed for controlled drainage of residential and light commercial hydronic heating systems. It operates with a quarter-turn ball valve mechanism, allowing a licensed plumber or HVAC technician to open or close flow quickly without multiple handle rotations. The compact form factor measures approximately 2.84 inches in length and 2.47 inches in width, making it a practical fit in tight mechanical spaces. Weighing 0.36 pounds, it is lightweight enough for straightforward single-tech installation. This type of drain valve is a standard service component on boilers and hot water heating loops.
This valve is suited for residential boiler systems and hydronic heating loops where periodic draining, flushing, or servicing is required. Typical installations include the drain port of a cast-iron or steel boiler, low points in hydronic piping runs, and service tees where system blowdown is performed seasonally or during maintenance. The 3/4-inch connection size is a common thread specification in residential boiler applications.
Designed as an OEM-style replacement boiler drain valve for residential and light commercial hydronic heating systems with a 3/4-inch drain port connection.
Installation should be performed by a licensed plumber or qualified HVAC technician in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Before removing or installing any drain valve, shut down the boiler, allow system pressure to drop to zero, and verify the system has cooled to a safe handling temperature. Use appropriate thread sealant or PTFE tape on male threads and do not overtighten, as this can crack fittings or distort the valve body seat. Confirm there are no leaks at the connection before returning the system to service.
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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