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Bell & Gossett NBF-36 Replacement

The Bell & Gossett NBF-36 is a 1/6 HP, 3300 RPM 3-speed lead-free bronze wet-rotor circulator (P/N 103401LF, 115V). Below: the specs we verify before quoting, and what to check on your nameplate.

Verified specifications

Part number103401LF (replaces 103401)
Horsepower1/6 HP
Speed3300 RPM, 3-speed
Voltage115V, single-phase, 60 Hz
Amps2.3A/270W
ConstructionWet-rotor
BodyLead-free bronze
ImpellerNoryl
ShaftCeramic
BearingsCarbon
Max flow36 GPM
Max head~33 ft
Max pressure150 psi
Max temperature225°F

Wet-rotor cartridge design: the rotor runs in the system fluid, so there is no mechanical seal to fail. Always include the part number (103251, 103254) when quoting — that's what wholesalers search.

VERIFIED against distributor spec blocks — clears batch-1's distributor-only flag. One distributor lists "1/2 HP" — a typo; every other source says 1/6 HP.

Confirming the right replacement

Before we quote, compare these fields on your failed pump's nameplate. If any of them differ, send us a photo of the nameplate and we'll match it exactly rather than guessing:

Other Bell & Gossett models

Need a Bell & Gossett NBF-36?

Send the nameplate off your failed unit. We'll confirm the match and quote the NBF-36 or a verified equivalent with availability and lead time.

Quote this pump