00 Series Stainless Steel Circulator Pumps

Taco 00 Series stainless steel cartridge circulator pumps are wet-rotor, in-line, single-stage circulators built for open-loop and potable water applications where cast iron construction isn’t an option. The stainless steel construction handles open-loop solar heating, domestic hot water recirculation, heat recovery, and water source heat pump service without the corrosion risk that comes with cast iron in those systems. Every Taco 00 Series stainless steel circulator carries a flange-to-flange three-year warranty and runs on a self-lubricating, seal-free wet-rotor design that eliminates most common failure points. The field-replaceable cartridge contains all moving parts, so a service call means swapping a cartridge, not pulling the entire pump. Flow ranges across the stainless lineup run from 0 to 30 GPM depending on the model, with head ranges from 7.5 feet up to 35 feet, giving installers the coverage to spec the right unit across a wide range of residential and light commercial load profiles.

Model 007-SF5 — Standard Single-Speed Workhorse. The Taco 007-SF5 is the single-speed stainless steel version of the 007, one of the most widely installed hydronic circulators in the residential market. Rated at 1/25 HP and 115V, it moves up to 23 GPM against a maximum head of 10 feet, with a working pressure rating of 125 PSI and a fluid temperature range of 40°F to 230°F. Ideal for hydronic heating, radiant floor systems, hydro-air fan coils, indirect water heaters, and domestic hot water recirculation. The stainless construction makes the 007-SF5 the right call wherever the system uses open-loop fresh water or the installer needs to avoid cast iron.

Models 008-SF6 and 009-SF5 — Higher-Head Applications. The Taco 008-SF6 and 009-SF5 are the go-to stainless options when head requirements push beyond what the 007 delivers. The 008-SF6 handles flows up to 14 GPM at heads up to 16 feet, rated at 1/25 HP, and suits higher-head heat recovery, water source heat pump circuits, open-loop solar, and domestic recirculation. The 009-SF5 takes a different cut on the performance curve, running up to 10 GPM against heads up to 35 feet at 1/8 HP, making it the right pick for higher-head/lower-flow residential and light commercial jobs, including heat recovery and open-loop solar. Both models carry the standard field-replaceable cartridge and the same universal flanged connection sizes: 3/4", 1", 1-1/4", and 1-1/2".

Model 0010-SF3 — Medium-Head/Medium-Flow Stainless. The Taco 0010-SF3 is Taco’s high-velocity stainless circulator designed for medium-head and medium-flow applications in residential and light commercial systems. Running at 1/8 HP, it delivers flows up to 30 GPM against a maximum head of 11.5 feet, with the same 125 PSI working pressure and 40°F to 230°F temperature ratings that carry through the stainless lineup. Typical applications include primary-secondary loops, radiant heating, indirect water heaters, chilled water cooling, and potable hot water systems. The stainless steel body handles open-loop fresh water service directly without special treatment.

3-Speed Stainless Models (0013-MSSF2-IFC) — IFC with Multi-Speed Control. The 3-speed stainless steel models in the 00 Series add an Integral Flow Check (IFC) directly into the pump casing, eliminating the need for a separate in-line check valve and reducing installation costs. IFC models prevent gravity flow between zones, which matters on any multi-zone system where backflow would undermine zone isolation. The 3-speed switch lets the installer dial in the speed that matches the original pump performance on a service call or fine-tune flow on a new installation. The stainless steel 3-speed models are listed to NSF 61 and 372, confirming their suitability for potable water and domestic hot water recirculation service.

Model 005-SF2 — Low-Flow Domestic and Radiant Applications. The Taco 005-SF2 is the smallest stainless circulator in the 00 Series lineup, suited for low-flow domestic, radiant, and hydronic applications where a larger pump would be oversized. Rated at 1/35 HP, it’s a compact, direct-drive unit that fits add-a-zone work, domestic water systems, and light hydronic applications where low power consumption matters as much as reliability. Like every 00 Series circulator, the 005-SF2 features the replaceable cartridge design, no mechanical seal, and the self-lubricating wet-rotor construction.

Selecting a Taco 00 Series stainless steel circulator starts with one question: is the system open-loop or closed-loop? Stainless steel construction is the correct material choice for open-loop systems handling fresh potable water, domestic hot water recirculation, open-loop solar, and heat recovery circuits. Cast iron variants of the same 00 Series models handle closed-loop hydronic heating where glycol or treated water is the working fluid. Specifying a cast iron pump on an open-loop potable water application can create corrosion issues; the stainless models resolve that without a second thought.

Once material is confirmed, match the model to the system’s flow and head requirements. The 007-SF5 at up to 23 GPM and 10 feet of head covers the majority of residential hydronic and domestic recirculation work. Systems with longer pipe runs or higher friction losses may need the 009-SF5, which gives up flow (10 GPM max) in exchange for significantly more head at up to 35 feet. The 0010-SF3 fills the medium-flow/medium-head gap at up to 30 GPM and 11.5 feet. The 008-SF6 at 14 GPM and 16 feet of head fits higher-head applications where the 007 runs short.

For multi-zone systems, the IFC models simplify the installation by building the flow check into the pump body. On a service call, the 3-speed stainless models function as universal replacements for most commonly installed residential circulators, with a speed selector that dials in the original pump’s performance profile. When the application is potable water and compliance matters, confirm that the selected model carries NSF 61 and 372 listing. The 3-speed stainless steel 00 Series models carry that listing. All 00 Series stainless circulators run on 115V single-phase power, accept flanged connections in 3/4" through 1-1/2" sizes, and carry a flange-to-flange three-year warranty.

FAQs

What’s the difference between Taco 00 Series stainless steel and cast iron circulators?

The difference between Taco 00 Series stainless steel and cast iron circulators is the type of system each is designed to serve. Cast iron models are built for closed-loop hydronic heating and chilled water systems where treated or glycol-dosed water is the working fluid. Stainless steel models are designed for open-loop applications handling fresh potable water, domestic hot water recirculation, open-loop solar, and heat recovery circuits where cast iron could corrode. Both versions share the same 00 Series cartridge design, wet-rotor construction, and flange dimensions.

How does the field-replaceable cartridge work on Taco 00 Series stainless steel circulators?

The field-replaceable cartridge in Taco 00 Series stainless steel circulators contains all moving parts in a single, self-contained assembly. To service the pump, the cartridge is removed and replaced without removing the pump body from the piping. Replacing the cartridge effectively rebuilds the circulator on the job site, eliminating the need to swap the entire unit. The replacement cartridge part numbers for common stainless models are documented in Taco’s published replacement parts lists.

Which Taco 00 Series stainless steel circulator works for domestic hot water recirculation?

Several Taco 00 Series stainless steel circulators suit domestic hot water recirculation, with model selection depending on the system’s flow and head requirements. The 007-SF5 handles flows up to 23 GPM at up to 10 feet of head and is a common choice for residential domestic recirculation. The 3-speed stainless models with IFC, such as the 0013-MSSF2-IFC, carry NSF 61 and 372 listing, confirming suitability for potable water service. The 005-SF2 covers lower-flow domestic applications where a full-size 007 would be oversized.

What working pressure and temperature ratings do Taco 00 Series stainless steel circulators carry?

Taco 00 Series stainless steel circulators are rated to a maximum working pressure of 125 PSI for most single-speed models in the lineup. Fluid temperature range runs from a minimum of 40°F (4°C) to a maximum of 230°F (110°C) across the stainless series. Installers working on systems approaching the pressure or temperature limits should confirm ratings for the specific model against Taco’s published submittal data before specifying.

Do Taco 00 Series stainless steel circulators include a flow check, and when is the IFC version needed?

Standard Taco 00 Series stainless steel circulators do not include an integral flow check; IFC versions are a separate model designation. An Integral Flow Check (IFC) is worth specifying on multi-zone systems where preventing gravity circulation between zones is a requirement, or where eliminating a separate in-line check valve reduces installation time and material. The IFC is built directly into the pump casing on IFC-designated models, so it’s accessible for service without removing the pump from the line.