Taco Bronze Pumps

Taco bronze circulator pumps are wet-rotor, cartridge-style hydronic circulators built from bronze construction for use in potable water, domestic hot water recirculation, and fresh water heating and cooling applications where cast iron can't go. Bronze construction resists corrosion from oxygenated water and meets low-lead requirements for potable water contact, making Taco bronze circulator pumps the go-to choice when the system carries drinking water or fresh water that cast iron would deteriorate. The 00 Series line handles fluid temperatures up to 220°F and works at a maximum working pressure of 125 PSI, covering the full range of residential and light commercial hydronic applications. From a compact 003 running a small recirculation loop to a 110 Series three-piece handling primary-secondary zoning on a larger commercial job, Taco bronze circulator pumps deliver the same field-serviceable cartridge design the 00 Series has built its reputation on, just in a material that won't let oxygenated water eat it alive.

KEY SUBCATEGORIES / PRODUCT TYPES

Taco 003 Bronze Cartridge Circulator

The Taco 003 is a compact, 1/40 HP bronze wet-rotor circulator designed for lower-flow recirculation in open or closed loop fresh water applications. Its design operating condition targets flow for systems up to 200 total feet of 3/4" supply and return pipe, making it well-suited for domestic hot water recirculation loops and heat recovery units in smaller residential installations. The 003 bronze body makes it compatible with potable water systems where iron construction would be a problem, and the replaceable cartridge keeps field service simple without pulling the whole pump. Available in 1/2" and 3/4" sweat connections.

Taco 006 Bronze Cartridge Circulator

The Taco 006 handles the middle tier of flow demand with a flow range of 0 to 10 GPM and a head range of 0 to 9 feet at a maximum fluid temperature of 220°F. It's designed for circulating hot or chilled fresh water in open or closed loop applications, covering domestic hot water recirculation, hydro-air heating and cooling, water source heat pumps, and drain-down open loop solar systems. Bronze construction clears the bar for potable water use where local codes require it. The 006 also ships in a Plumb n' Plug configuration with a built-in timer and line cord for fast, uncomplicated installation in recirculation setups.

Taco 007 Bronze Cartridge Circulator

The Taco 007 is one of the most widely specified circulators in residential hydronic work, and the bronze version extends that reach into potable and fresh water applications. The 007 bronze delivers a flow range of 0 to 23 GPM with a head range of 0 to 10 feet, driven by a 1/25 HP motor at 115V. Maximum working pressure is 125 PSI, and the pump handles fluid temperatures from 40°F up to 230°F in stainless steel variants. The 007-IFC configuration adds an Integral Flow Check inside the casing, eliminating a separate inline flow check valve and reducing both installed cost and piping complexity in multi-zone systems.

Taco 110 Series Bronze Three-Piece Circulator

The Taco 110 Series bronze three-piece circulator is a flanged, in-line pump built for residential and light commercial hydronic systems that need more output than the 00 Series wet-rotor line provides. Available in 1/12 HP configuration, the 110 Series bronze construction suits domestic hot water and fresh water service where cast iron would corrode. The three-piece design, with a one-piece non-ferrous impeller, stainless steel shaft, and rugged bronze sleeve bearing, allows for straightforward service without special tools. The 110 Series is also a common choice for primary-secondary systems and parallel pumping layouts in larger zoned installations.

Taco 00 Series Bronze IFC Cartridge Circulators

The Taco 00 Series IFC circulators combine the standard bronze wet-rotor cartridge design with a factory-installed Integral Flow Check at the impeller inlet. The IFC prevents reverse flow and gravity circulation without a separate inline valve, which reduces installation costs and keeps the piping cleaner on multi-zone jobs. The IFC is removable for service and doesn't require pulling the circulator from the line. Available across several models in the 00 Series family, the bronze IFC variants cover fresh water and potable water zoning applications where a flow check would otherwise have to be added as a separate component.

BUYING GUIDE / HOW TO CHOOSE

Choosing the right Taco bronze circulator pump starts with one question: what is the water? If a system carries potable water or fresh water in an open loop, bronze or stainless steel construction is the correct call. Cast iron will corrode in oxygenated fresh water over time, and in potable water systems, low-lead bronze construction is typically a code requirement. Once the material question is settled, the sizing conversation begins.

Flow rate, measured in GPM, and head, measured in feet, are the two numbers that determine which Taco bronze circulator pump fits a given loop. For a domestic hot water recirculation loop in a single-family home, the Taco 003 or 006 typically covers the load, with the 003 targeting systems under 200 feet of 3/4" pipe and the 006 extending to the 200 to 400 foot range. For hydronic heating loops, radiant systems, and multi-zone jobs, the Taco 007 bronze, with a flow range of 0 to 23 GPM and a maximum head of 10 feet, handles the majority of residential applications.

When sizing Taco bronze circulator pumps for a hydronic heating system, work from the BTU load of the loop. The formula is straightforward: GPM equals BTU/hr divided by (500 times the system's design delta T). A common 20°F delta T on a typical residential loop produces a GPM target that falls squarely in the 007 range for most single-zone configurations. For higher-head or higher-flow applications, the 110 Series bronze three-piece circulators move up to 68 GPM across the 110 to 120 Series family at a maximum working pressure of 125 PSI.

On multi-zone systems, consider whether an IFC model simplifies the job. Taco bronze IFC circulators eliminate the separate inline flow check on each zone, which cuts installed components and keeps callbacks down. Where a system already has zone valves handling flow control, the standard bronze cartridge models are fine. The choice between the two comes down to piping layout and whether a gravity circulation risk exists in the zone.

FAQs

What's the difference between Taco bronze and cast iron circulator pumps?

The difference between Taco bronze and Taco cast iron circulator pumps is the material's compatibility with oxygenated and potable water. Cast iron circulators can corrode when used with fresh water that contains dissolved oxygen, making them a poor match for open loop systems, domestic hot water recirculation, and potable water applications. Bronze construction resists that corrosion and meets low-lead requirements for potable water contact, so Taco bronze circulator pumps are the correct specification wherever the system carries fresh or drinking water rather than the treated closed-loop water typical of a sealed hydronic heating system.

Can Taco bronze circulator pumps be used for domestic hot water recirculation?

Taco bronze circulator pumps are specifically designed for domestic hot water recirculation systems. The bronze casing and low-lead construction make Taco bronze circulators, including the 003, 006, and 006-IFC, compatible with potable water lines, and the 00 Series wet-rotor design operates with a self-lubricating cartridge that requires no mechanical seal, reducing leak potential in domestic applications. Taco's Plumb n' Plug bronze models add a built-in timer and line cord, which simplifies installation on recirculation loops where a standalone timer would otherwise be needed.

How do I size a Taco bronze circulator pump for a hydronic heating system?

Sizing a Taco bronze circulator pump for a hydronic heating system starts with calculating the required GPM from the loop's BTU load using the formula: GPM equals BTU/hr divided by (500 times the system's design delta T). A common 20°F delta T is a standard design target for residential baseboard systems. Once the GPM and estimated head loss for the loop are known, those two numbers get plotted against Taco's published pump curves to identify the model that operates near its best efficiency point. For most residential hydronic loops, the Taco 007 bronze covers the flow range; larger or higher-head commercial loops may point toward the Taco 110 or 120 Series bronze three-piece circulators.

What is the Taco IFC and when should a bronze IFC circulator be specified?

The Taco IFC, or Integral Flow Check, is a factory-installed check valve located at the impeller inlet inside the pump casing that prevents reverse flow and gravity circulation without requiring a separate inline flow check valve. A bronze IFC circulator should be specified on multi-zone hydronic systems where individual circulators drive each zone and where gravity circulation or reverse flow between inactive zones could be a concern. The IFC's low cracking pressure, approximately 1/4 PSI, creates less flow restriction than a typical standalone inline check, which can improve pump performance. On systems controlled by zone valves rather than individual zone circulators, a standard bronze cartridge circulator without an IFC is often sufficient.

What's the maximum fluid temperature for Taco bronze circulator pumps?

The maximum fluid temperature for Taco bronze circulator pumps varies by series. The Taco 003 and 006 bronze circulators are rated to a maximum fluid temperature of 220°F, while the Taco 007 bronze operates up to 230°F depending on the specific configuration. The Taco 110 Series bronze three-piece circulators handle fluid temperatures up to 240°F. All Taco bronze circulator pumps carry a minimum fluid temperature rating of 40°F, making them suitable for the full range of residential and light commercial hydronic heating applications. Always confirm the maximum fluid temperature for the specific model against Taco's published engineering documentation before specifying on high-temperature systems.