Series 100 Pumps & Parts

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.

Bell & Gossett Series 100 Pump Documentation

B&G Series 100 Pump Features

  • Sleeve bearing, oil lubricated motor
  • 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
Bell & Gossett Series 100 Pump Diagram
  1. 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.

  2. Noise dampening coupler. B&G's own flexible spring design adds to the quiet operation. Do not accept a substitute.

  3. Long bronze sleeve bearings maintain exact shaft alignment. Provides for constant circulation of oil over bearing surfaces.

  4. 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.

  5. The B&G mechanical seal is designed to withstand a wide range of water temperature pressures, additives and dissolved solids common in hydronic systems.

  6. 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 Complete Repair

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  1. Bell & Gossett Series 100 Pump

    Bell Gossett 106189 - Series 100 Pump with Cast Iron Body and 1/12 HP Motor

    SKU: BH1010

    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
    $285.00
  2. Bell Gossett 106197 - Series 100 Pump with Bronze Body and 1/12 HP Motor

    Bell Gossett 106197 - Series 100 Pump with Bronze Body and 1/12 HP Motor

    SKU: BH1005

    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
    $627.90
  3. Bell Gossett 189134 - Bearing Assembly with Impeller for Series 100 Pumps

    Bell Gossett 189134 - Bearing Assembly with Impeller for Series 100 Pumps

    SKU: BG1453

    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. Learn More
    $96.80
  4. Bell Gossett 118844 - Bearing Assembly for Series 100 Pumps

    Bell Gossett 118844 - Bearing Assembly for Series 100 Pumps

    SKU: BG1330

    Bearing assembly on Series 100 iron body pumps, including models 100 NFI (106189) and 100 BI (106190). Learn More
    $92.00
  5. Bell Gossett 189034 - Bearing Assembly for Series 100 Pumps

    Bell Gossett 189034 - Bearing Assembly for Series 100 Pumps

    SKU: BG1435

    Bearing assembly on Series 100 all bronze pumps, including models 100 AB (106192) and 100 BNFI (106197). Learn More
    $89.60
  6. Bell Gossett 118223 - Motor Mount Set for Series HV, PR, 1, 1-1/4, 1-1/2, 2, 60 and 100 Pumps

    Bell Gossett 118223 - Motor Mount Set for Series HV, PR, 1, 1-1/4, 1-1/2, 2, 60 and 100 Pumps

    SKU: BG1150

    Pair of 118223 motor mounts to fit all Bell & Gossett series 100 1/12HP, HV and 2" booster pumps. Learn More
    $19.60
  7. Bell Gossett 118705 - Coupler for Series HV, PR, 1, 1-1/4, 1-1/2, 2 and 100 Pumps

    Bell Gossett 118705 - Coupler for Series HV, PR, 1, 1-1/4, 1-1/2, 2 and 100 Pumps

    SKU: BG1310

    Spring coupling 1/2"x1/2". Fits Bell & Gossett 100 1"-2" and HV booster pumps. Learn More
    $15.21
  8. Bell Gossett 189110 - Coupler for Series HV, PR, 1, 1-1/4, 1-1/2, 2 and 100 Pumps

    Bell Gossett 189110 - Coupler for Series HV, PR, 1, 1-1/4, 1-1/2, 2 and 100 Pumps

    SKU: BG1490

    Spring pump coupling 1/2"x1/2". Fits series 100 1/12 HP booster pumps. Learn More
    $22.80
  9. Bell Gossett 118681 - Seal Kit for a Variety of B&G Pumps

    Bell Gossett 118681 - Seal Kit for a Variety of B&G Pumps

    SKU: BG1300

    Bell & Gossett Seal kit for 118844, 189034, all 189100 series and 186863 bearing assemblies. Learn More
    $26.80
  10. Bell Gossett 189132 - Impeller for Series 100 Pumps

    Bell Gossett 189132 - Impeller for Series 100 Pumps

    SKU: BG1510

    Non-Ferrous impeller 2-3/4" O.D. for series 100 booster pumps. Learn More
    $18.28
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