Hydronic Circulator Pumps

A circulator pump moves hot water through the pipes of a hydronic heating system, keeping heat flowing to radiators, baseboards, or radiant floor loops. Voomi Supply carries Taco and Grundfos circulator pumps in wet-rotor and dry-rotor designs for residential and commercial heating systems.

Customer Support Image
Need Support?

Call Jack and His Team

High-Quality Circulator Pumps for Efficient Heating Systems

Browse our selection of circulator pumps, including reliable models like the Taco and Grundfos circulator pumps. These pumps are essential for circulating water in heating systems, ensuring consistent temperature and comfort.

Wet-Rotor vs. Dry-Rotor Circulator Pumps

Circulator pumps are built one of two ways, and the difference affects noise, maintenance, and how much head pressure the pump can handle.

Type

How It Works

Maintenance

Best For

Wet-rotor

Rotor and bearings sit in the system water, which lubricates and cools them

Sealed, virtually maintenance-free

Residential and light commercial zones

Dry-rotor

Rotor is isolated from the water by a mechanical shaft seal

Seal and bearings need periodic service

Larger commercial systems needing higher head pressure

 

Choosing the Right Circulator Pump

Sizing a circulator pump comes down to two numbers: flow rate (GPM) and head pressure, the resistance the pump has to overcome from pipe length, fittings, and elevation change. A system with more zones or longer piping runs needs a pump with higher head pressure, even if the total flow rate stays modest. Check your boiler or system design specs for these figures, or ask our team to help confirm sizing before you order.

Circulator Pump Connection Types

How a pump connects to your piping affects both installation and future serviceability.

Connection Type

Description

Typical Use

Flanged

Bolts to matching flanges on the pipe

Larger pumps, commercial systems, easy removal for service

Threaded (NPT)

Screws directly into threaded pipe fittings

Small to mid-size residential pumps

Sweat (solder)

Soldered directly to copper pipe

Common on compact residential circulators

 

Frequently Asked Questions

A circulator pump is responsible for circulating water or other fluids through the pipes in hydronic heating and cooling systems. It ensures continuous flow to maintain temperature and efficiency in the system.

We offer a variety of circulator pumps, including in-line pumps, wet-rotor pumps, and standard circulators, designed for both residential and commercial HVAC systems.

The right circulator pump depends on your system’s size, flow rate, and head pressure requirements. It’s important to check the product specifications or consult with our team for assistance in selecting the right model.

Yes, you can replace an old circulator pump, but ensure compatibility with your system’s specifications. Be sure to check the capacity, voltage, and pump type before replacing.

Installation involves connecting the pump to the system’s piping and ensuring proper alignment for smooth water flow. For best results, follow the manufacturer's instructions or consult a professional HVAC technician.

A wet-rotor pump has its rotor and bearings in direct contact with the system water, which keeps it quiet and low-maintenance. A dry-rotor pump isolates the rotor with a mechanical seal, which allows for higher head pressure but requires periodic seal and bearing service.

Many single-zone systems run on one circulator pump. Multi-zone systems typically use either one circulator pump per zone or a single pump paired with zone valves, depending on how the system was designed.