Bell & Gossett NBF-36

The Bell & Gossett NBF-36 is a 120V, 1/6 HP three-speed bronze lead-free circulator designed for reliable hydronic performance in home heating, radiant flooring, and cooling loops. This model replaces 103401 and fits standard installations, delivering smooth flow across a range of system pressures with dependable operation. Ideal for upgrading single-family homes, multi-zone heating, and radiant floor installations, the NBF-36 offers straightforward wiring and dependable startup across the full speed range.

Key features include:

• Three-speed operation for precise flow control and system balance
• Bronze, lead-free body for durability and code compliance
• 120V motor with 1/6 HP rating for high-efficiency performance
• Quiet operation that minimizes noise in residential and light commercial applications
• Easy retrofit, replacement for 103401, and broad compatibility with boiler setups

Designed for easy installation and long service life, the NBF-36 is a smart upgrade for existing boilers and radiant systems. Its durable construction and regulated performance help reduce energy use while maintaining comfort.