Verified specifications
| Order number | 99490916 |
|---|---|
| Horsepower | 1/6 HP |
| Speed | Variable-speed ECM — AUTOADAPT, constant-pressure, proportional-pressure modes |
| Voltage | 115V, single-phase, 60 Hz |
| Max amps | 1.7A |
| Power | 10–125W |
| Max flow | 26 GPM (Grundfos brochure) |
| Max head | 42 ft (Grundfos brochure) |
| Connection | Flanged, 6.5" port-to-port |
| Flow check | Built-in check valve |
| Liquid temperature | 14–230°F |
| Max working pressure | 150 psi |
AUTOADAPT: the ECM circulator continuously adjusts its speed to the system curve — no speed switch to set, and power draw drops to a fraction of a fixed-speed circulator. Grundfos GO remote control is available on supported models.
Supersession chain: ALPHA1 15-55F → ALPHA2 15-55F (discontinued Nov 30, 2024) → current ALPHA 15-58F. The ALPHA line is the direct ECM replacement for the UPS 3-speed circulators.
The direct ECM counterpart to the UPS26-99FC — same size class, variable-speed control.
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:
- Full model number — including the part number (e.g. B&G P/N) where one exists
- Voltage and phase
- System duty: flow (GPM), head (ft), and fluid — heating water vs. potable water matters
- Flange size and orientation for in-line replacements
Other Grundfos models
- More Grundfos modelsBrowse every Grundfos model page we quote
- Grundfos UPS26-99FC3-speed counterpart — same size class
Need a Grundfos ALPHA2 26-99F?
Send the nameplate off your failed unit. We'll confirm the match and quote the ALPHA2 26-99F or a verified equivalent with availability and lead time.
Quote this pump