it features a standard 7/16-inch hex head for reliable torque during installation and 1/8-inch NPT threading to ensure a leak-free manifold connection

Precision Draft Regulation: Maintains stable chimney draft to prevent inefficient fuel consumption

Its heavy-duty construction handles the thermal expansion and pressure fluctuations common in HVAC and plumbing applications

Compact Form Factor: Small footprint allows for easy installation in tight furnace vestibules and compact burner compartments

Durable Brass Construction: High-grade material provides superior resistance to corrosion and ensures reliable seating over multiple service cycles

Bell & Gossett 103401LF Circulator 320074-702 it features a standard 7/16-inchThe Bell & Gossett 103401LF is a high efficiency, lead free bronze wet rotor circulator designed for quiet, maintenance free performance in potable water and hydronic heating systems. As the direct replacement for the legacy 103401 model, this NBF 36 circulator pump features a 1 6 HP, 115V single phase motor delivering up to 3300 RPM. The three speed motor allows technicians to field adjust the pump curve to match specific system requirements,