As colder weather sets in, many households notice it takes longer for hot water to reach distant fixtures, which is often a sign of a recirculation issue. The right Grundfos recirculation pump solves that frustration, keeps callbacks down, and helps contractors deliver a professional install. But not all applications are the same.

Answering three quick questions makes it easier to choose the right solution the first time.

Dedicated Line or Retrofit?

Dedicated Line Systems: When a hot water return line is available, circulator pumps like the Grundfos ALPHA (ECM) or UPS (3-speed) are the go-to choice. They move hot water efficiently through the loop, saving time and energy.
Retrofit Systems (No Return Line): For existing homes without a dedicated line, the Grundfos ALPHA Comfort System installs directly on the water heater and uses the cold-water line as a return path — a fast, simple way to deliver hot water to distant fixtures without repiping.

Note: The Comfort PM still requires a dedicated recirculation line, while the ALPHA Comfort System is designed specifically for homes without one.

What’s the Application?

• New construction or larger homes: A dedicated loop with an ALPHA or UPS pump is typically best.
• Retrofits or smaller jobs: The ALPHA Comfort System is typically the simplest and most efficient retrofit choice.
• Light commercial: Grundfos offers models sized for multi-unit or higher demand installs.

What Does the Homeowner Care About Most?

• Faster hot water (comfort and convenience).
• Lower utility bills (ECM ALPHA pumps deliver significant efficiency gains).
• Quiet operation (ALPHA Comfort System and ALPHA models are designed for quiet performance).

Whether it’s a high-efficiency ALPHA circulator or a quick-install ALPHA Comfort System, Milford stocks the most common Grundfos recirculation pumps and can quickly order specialty models through our rep network.

Visit your nearest Milford Supply counter to help choose the right Grundfos recirculation pump.