Can I replace a Taco 007-F5 with a Grundfos UPS15-58FC?

Yes. The Grundfos UPS15-58FC is an exact physical drop-in replacement for the Taco 007-F5. Both utilize identical 6-3/8 inch flange-to-flange spacing and 3-3/16 inch two-bolt flange patterns. On Speed 2, the Grundfos replicates the Taco 007 flow curve almost identically.

What is the difference between Taco 007-F5 and Taco 007-BF5?

The suffix indicates the casing metallurgy. The F5 designates Cast Iron, engineered strictly for closed hydronic circuits. The BF5 designates Bronze, which resists corrosive oxygen attack and is required by plumbing code for open domestic hot water (DHW) recirculation loops.

ARCHETYPE B: OEM COMPATIBILITY MATRIX

Taco 007-F5 Drop-in Cross-Reference Guide

Engineering comparison across physical flange standards, flow curves, power draw, and mechanical interchangeability for the most common residential heating circulator in North America.

Spec Alignment: OEM vs Drop-in Competitors

Parameter	Taco 007-F5 (Benchmark OEM)	Grundfos UPS15-58FC	Bell & Gossett NRF-22	Taco 007e ECM (Modern Upgrade)	Interchange Verdict
Flange-to-Flange	`6-3/8" (162 mm)`	`6-3/8" (162 mm)`	`6-3/8" (162 mm)`	`6-3/8" (162 mm)`	100% Match
Bolt Spacing (BCD)	`3-3/16" (81 mm)`	`3-3/16" (81 mm)`	`3-3/16" (81 mm)`	`3-3/16" (81 mm)`	100% Match
Flange Bolt Holes	2 × 1/2" slots (7/16" bolts)	2 × 1/2" slots	2 × 1/2" slots	2 × 1/2" slots	100% Match
Shutoff Head (Max ft)	10.0 ft	19.0 ft (Spd 3) / 14 ft (Spd 2)	15.0 ft	10.0 ft	Drop-in Valid
Max Flow (GPM @ 0 ft)	23.0 GPM	17.0 GPM	22.0 GPM	16.0 GPM	Drop-in Valid
Electrical Input	115V / 60Hz / 0.71A	115V / 60Hz / 0.75A	115V / 60Hz / 0.80A	115V / 60Hz / 0.54A	100% Match
Operating Wattage	85 Watts (Fixed)	60W / 75W / 87W (3-Speed)	92 Watts (Fixed)	5W – 44W (Modulating)	85% Energy Drop
Direct Action	View Taco 007	View Grundfos	View B&G	View 007e ECM	—

Critical Fit Dimensions Checklist

PHYSICAL GEOMETRY

Flange Dimensions

Flange-to-Flange Overall6-3/8" (162 mm)

Flange Width (Ear-to-Ear)4-1/4" (108 mm)

Bolt Hole Center-to-Center3-3/16" (81 mm)

Flange Bolt Size7/16" x 1-1/2" Grade 5 Hex

Companion Flange Pipe Sizes3/4", 1", 1-1/4" NPT / Sweat

MOTOR & ELECTRICAL

Electrical Clearance

Line Voltage115V AC ±10%, 60 Hz, 1-Phase

Conduit Knockouts1/2" Standard Trade (7/8" Hole)

Terminal Box OrientationRotatable 90° / 180° (4 Allen bolts)

Motor Clearance Outward5-1/8" (130 mm) from pipe center

Fluid Temperature Limits40°F (4°C) to 230°F (110°C)

Known Mechanical & Installation Gotchas

Integral Flow Check (IFC) Direction: When replacing a standard Taco 007-F5 with a Taco 007-F5-7IFC or Taco 007e, the internal check valve prevents gravity ghost flow. Verify flow arrow on cast iron body matches zone supply direction. If installing on return piping pointing down, remove the spring check if your system already possesses an external flow check.
Terminal Box Orientation Rule: Never position the motor with the terminal electrical box beneath the pump casing (6 o'clock position). If packing or flange gaskets weep, water drips directly into 120V wiring. The stator housing can be rotated to 12 o'clock, 3 o'clock, or 9 o'clock by removing the four 5/32" hex bolts.
Open Domestic Water Corrosive Seizure: Installing a cast iron 007-F5 or UPS15-58FC on domestic potable hot water recirc circuits will cause total iron oxidation and seize the rotor within 60 days. Always install the bronze equivalent (Taco 007-BF5 or Grundfos UP15-42B7).