Grundfos 99163903 ALPHA2 15-55F Cast Iron Circulator Pump w/ GF 15/26 Flange and Terminal Box 1/16 HP 115 V

Grundfos pump — Grundfos 99163903 ALPHA2 15-55F Cast Iron Circulator Pump w/ GF 15/26 Flange and Terminal Box 1/16 HP 115 V

The Grundfos pump (manufacturer part 99163903) is a genuine OEM pump available at Cedars HVAC, your trusted source for heating, cooling, and refrigeration parts. We stock this pump for fast nationwide shipping from our Miami warehouse, so contractors, facility managers, and homeowners can get the exact replacement they need without delay.

Product details

Grundfos Alpha2 15-55F Circulator Pump

ALPHA2 is the best pump to withstand the tough conditions in a heating system, and with four newly added features, it just got even tougher.  First it has a robust start-up, which shakes free any impurities before the pump starts at the beginning of the heating season.  Next is summer mode, and this is an adjustment of the pump’s performance in the summer to the warmer temperature outside – giving customers extra energy efficiency.  It also includes a magnetite resistance, which ensures that no small pieces of metal get stuck in the pump’s vital parts when they are magnetise.  Lastly is dry-running protection, which makes sure the pump never runs without liquid in the system.  This pumps new features are added to the already unrivalled energy efficiency, easy installation and the fact that ALPHA2 covers both your heating demands and up to 90 % of your air-conditioning and cooling demands.

Features:

• Simple push button
• Control enables the ALPHA2 to be programmed in one of 3-constant speed, 3-constant pressure, or AUTOADAPT control modes
• AUTOADAPT selects best performance curve for efficiency and comfort
• Flow meter for trouble-shooting and balancing
• Large LED display shows the current energy consumption in Watts and estimated flow in gallons per minute
• ALPHA2 is complete with an integrated check-valve, foam insulation jacket, and nut captures for flanges
• Robust startup enables the ALPHA2 to continuously attempt to restart – indefinitely – in blocked rotor conditions
• Innovative plug simplifies pump connection
• Insulation shells included
• ALPHA2 can be used as a replacement for more than 30 competitor pump model

Applications:

• Systems with constant or varying flow
• One pipe systems
• Two pipe systems
• Underfloor-heating
• Domestic hot-water recirculation
• Systems where night setback is required

Why buy from Cedars HVAC

• Genuine OEM Grundfos parts — not aftermarket substitutes
• Contractor-friendly pricing on every pump
• Fast nationwide shipping from Miami, FL
• Real HVAC expertise — call us at (305) 850-6693 if you need help confirming compatibility
• Financing available at checkout

About this part

This Grundfos pump is part of our Pumps catalog. If you are sourcing pumps for a fleet of equipment or a commercial install, contact us for volume pricing. For installation guidance, always refer to the manufacturer documentation and consult a licensed HVAC technician where required.

Shipping and returns

Most Grundfos pump orders ship the same or next business day from Cedars HVAC in Miami, Florida. Standard ground shipping covers the continental United States, and expedited options are available at checkout. Returns are accepted within 30 days on unopened, uninstalled parts — see our return policy for full details. International shipping is available on request; contact our team for a quote.

Frequently asked questions

Is this an OEM Grundfos part? Yes, the Grundfos pump we sell is a genuine Grundfos pump sourced through authorized channels. We do not substitute aftermarket parts unless specifically marked.

Will this pump fit my equipment? Compatibility depends on the model and revision of your existing equipment. If you need help confirming fitment for the Grundfos pump, call us at (305) 850-6693 with your unit model number and we will confirm before you order.

Can I get a contractor or wholesale discount? Yes. Cedars HVAC offers volume pricing for licensed HVAC contractors, property managers, and resellers. Request contractor pricing or call us to set up an account.

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