B38;K Llc 102-004 Boiler Drain Valve 3/4 in Mpt Cast Iron

Product Description

The B38;K LLC 102-004 is a boiler drain valve designed for residential and light commercial plumbing systems. It features a 3/4 inch male pipe thread (MPT) inlet, a 1/2 inch female pipe thread (FPT) connection, and a 3/4 inch hose thread outlet for attaching a standard garden or drain hose. The cast iron handle provides a secure grip for operation. Pipe threads conform to ANSI B1.20.1 and hose threads conform to ANSI B1.20.7, ensuring dimensional compatibility with standard-spec fittings. Licensed plumbers and HVAC technicians use this valve to drain boilers, water heaters, and hydronic system piping during service or winterization.

This boiler drain valve is suited for installation on residential hot water boilers, hydronic heating systems, and water distribution piping where a drain point is required. The dual-thread configuration — MPT inlet with a hose thread outlet — allows direct hose attachment for controlled drainage to a floor drain or exterior discharge point. It is appropriate for both new installation and replacement service work on standard iron or steel pipe systems.

Key Features

• 3/4 inch male pipe thread (MPT) inlet compliant with ANSI B1.20.1
• 1/2 inch female pipe thread (FPT) connection for inline installation flexibility
• 3/4 inch hose thread outlet compliant with ANSI B1.20.7 for standard hose attachment
• Cast iron handle for positive shutoff operation without tools
• Compact body measuring 3.25 inches in length for tight installation spaces

Compatibility

Designed as an OEM-style replacement or new-installation boiler drain valve for residential and light commercial plumbing and hydronic heating systems using standard 3/4 inch MPT pipe connections.

Installation Notes

Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC requirements. Shut off water supply and relieve system pressure before removing or installing any drain valve. Apply thread sealant tape or pipe compound to male threads before assembly and tighten to hand-snug plus a quarter turn — do not overtighten cast iron-handled valves. Confirm the hose thread outlet is fully closed before restoring system pressure.