Performance & Sizes
- Sizes 1½ to 6 inches.
- 20–2,650 GPM, 5–380 ft head and ½–60 HP, depending on model.
- Standard ANSI Class 125 flanges; optional Class 250.
Close-Coupled End Suction Pump
Taco CI / SCI Close-Coupled End Suction Pumps
CI / SCI Series — 20–2,650 GPM, 5–380 ft head, ½–60 HP, 1½" to 6"
Taco CI / SCI Close-Coupled End Suction Pumps from Taco Comfort Solutions are single-stage centrifugal pumps for heating, cooling, pressure boosting and water supply, from 20 to 2,650 GPM in 1½" to 6" sizes.
Manufactured by
Taco Comfort Solutions
Taco CI / SCI Close-Coupled End Suction Pumps
Review the confirmed product information, including description, features, benefits, and applications.
Taco CI and SCI pumps are single-stage centrifugal pumps for quiet water circulation in heating, cooling, pressure boosting and water supply systems. They combine a compact, close-coupled design with a self-venting, top centerline discharge.
Rear pullout construction allows servicing without disturbing system piping, while a dry shaft and replaceable shaft sleeve simplify maintenance.
SCI SelfSensing versions offer integrated variable-speed control and ProBalance® system balancing. Optional ECM motor packages improve energy efficiency.
Pressure & Temperature
- Working pressure: 175 PSIG (1,210 kPa) standard; optional 300 PSIG (2,070 kPa), subject to pressure–temperature limits.
- Fluid temperature: 250°F (120°C); cooled seal flushing recommended above 225°F and required above 250°F.
Construction & Materials
- Cast iron casing and cover; ductile iron casing for Class 250.
- Bronze or stainless steel impeller; carbon steel shaft.
- Seal: ceramic/EPT standard; optional tungsten carbide or silicon carbide.
- Integral mounting feet, replaceable shaft sleeve, rear pullout design and self-venting discharge.
- ¼-inch NPT suction and discharge pressure taps and casing drain.
Controls & Options
- SCI controls: constant flow, constant pressure, flow compensation and duplex alternation.
- SCI dry-run and no-flow alerts with optional shutdown.
- ECM package: 3–10 HP, 1,750 RPM, 230/460 V, three-phase, 60 Hz; TEFC motor with required variable-frequency drive.
- Options: replaceable bronze wear ring, seal flush line, 5-micron filter and cyclone separator.
- eLink™ NFC access to equipment documentation and support information.
Simple Installation
Close-coupled design simplifies installation and reduces piping strain.
Service Without Repiping
Rear pullout construction enables maintenance without disconnecting system piping.
Protected Shaft
Dry shaft design protects the shaft from circulating fluid and reduces servicing costs.
Demand-Based Operation
Optional SelfSensing controls and ECM packages reduce balancing effort and energy consumption.
Taco CI / SCI pumps circulate water in building heating, cooling and water supply systems.
Heating Systems
Hot water circulation in heating systems.
Air Conditioning & Chillers
Air conditioning, constant-flow chiller/boiler and secondary variable-flow systems.
Pressure Boosting
Pressure boosting duties in building water systems.
Water Supply & Transfer
Water supply and cooling water transfer.
NSF 61
NSF 61 construction is available.
ANSI B16.1
Flange pressure–temperature ratings to ANSI B16.1.
ANSI Grade G6.3
Impellers are balanced to ANSI Grade G6.3.
UL 778 / CSA C22.2 No. 108
SCI electronic motor protection per UL 778 and CSA C22.2 No. 108.
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