With over 10 million units sold, the Bell & Gossett Series 100 Inline Circulator Pump sets the standard for performance and reliability. The B&G Series 100 is the leader in residential hot water circulation. The three-piece oil lubricated design maintains its reputation as the Industry's rugged, dependable workhorse. The Series 100's intelligent design combined with efficient hydraulic performance also helps maintain low noise levels. Being the industry standard provides no shortage of maintenance advantages! You can replace just about any part on the Series 100 with ease – bearings, shaft and seals can all be repaired in the field.
Its noise dampening spring coupler ensures quiet operation
Precision ground oversized pump shaft provides long seal & bearing life
Rugged mechanical seal that withstands wide temperature variation
B&G Motor - The heart of the Booster. The finest circulator motor available. Sleeve bearing, oil lubricated with replaceable motor mounts. B&G motors are designed and manufactured specifically for the B&G boosters.
Noise dampening coupler. B&G's own flexible spring design adds to the quiet operation. Do not accept a substitute.
Long bronze sleeve bearings maintain exact shaft alignment. Provides for constant circulation of oil over bearing surfaces.
Precision ground pump shaft is oversized to provide large bearing surfaces. Hardened integral thrust collar minimizes end-thrust to ensure long seal and bearing life.
The B&G mechanical seal is designed to withstand a wide range of water temperature pressures, additives and dissolved solids common in hydronic systems.
Centrifugal impeller prevents accumulation of air at seal faces to assure long life. Close impeller/body tolerances minimize water slippage and maximize efficiency.
Bell & Gossett Series 100 three-piece cast iron body booster pump for hydronic heating and cooling in closed loop systems. The Model 100 NFI is oil lubricated with a 1/12 HP, 1725 RPM, 115v single phase motor. Flanges available separately in 3/4" through 1-1/2" IPS. Learn More
Bell & Gossett Series 100 three-piece bronze body booster pump for potable, domestic water. The Model 100 BNFI is oil lubricated with a 1/12 HP, 1725 RPM, 115v single phase motor. Flanges available separately in 3/4" through 1-1/2" IPS. Learn More
Bell & Gossett bearing assembly 189134 with impeller, body gasket and tube of pump lubricating oil. Everything pre-assembled for quick and easy repair of your Bell & Gossett Series 100, red-colored (cast iron) pump.
State Supply is a Bell & Gossett Master Distributor. We carry Bell & Gossett's entire line of hydronic pumps and repair parts, as well as many obsolete parts. Custom-built Bell & Gossett pumps are shipped in as little as 3-days.