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Cast iron hydronic circulating pump with flange connections, 1/2 HP motor

Taco Inc

Taco Inc Hydronic Circulating Pump 1/2HP 115V 2400-70-3P

SKU CH-6GZA-09VX4

Hydronic circulating pump delivers up to 90 GPM at 11 ft head with 1/2 HP motor on 115 V power

  • Delivers up to 90 GPM at 11 ft head for strong closed-loop flow
  • Best efficiency at 70 GPM and 18 ft head reduces energy use
  • 1/2 HP motor runs on standard 115 V single-phase power
  • Cast-iron housing withstands continuous hydronic service
  • Direct-drive design eliminates coupling wear for longer life

Hydronic Circulating Pump 1/2 HP 115V AC

The Taco 2400-70-3P is a direct-drive hydronic circulating pump rated at 1/2 hp on 115V single-phase power. It serves closed-loop heating and cooling systems in residential and light commercial installations. The cast-iron housing and flanged connections suit hydronic circuits requiring a 2-inch inlet and outlet.

Shut-off 22 ft best efficiency 70 gpm at 18 ft

At shut-off the pump develops 22 ft of head with a minimum flow of 10 gpm. Best efficiency occurs at 70 gpm against 18 ft of head, while the maximum rated flow reaches 90 gpm at 11 ft. Direct-drive construction eliminates belt losses and reduces mechanical noise during continuous operation.

No flange or gaskets supplied

The unit ships without flanges or flange gaskets, so the installer must provide matching 2-inch flanges and seals. Face-to-face dimension is 8 1/2 inches, allowing straightforward replacement in existing piping layouts. Loop configuration is closed only, limiting use to sealed hydronic systems.

How it compares

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Price $1,251.99
Pricier than about 99% of the 161 comparable items (median $49.99).

Specifications

Product
Brand nameTaco

Questions about this item

How do I install the 2400-70-3P pump and what is the common mistake?

Mount the pump with the motor horizontal on the closed-loop piping, using the 8 1/2 in face-to-face flange spacing; the step most people miss is installing the flange gaskets before tightening the bolts.

What maintenance or replacement will the 2400-70-3P need later?

The cast-iron housing and direct-drive design have no user-serviceable bearings; plan to replace the entire pump assembly when flow drops below 10 gpm at 22 ft head or the motor fails.

What limit appears first during sustained operation of the 2400-70-3P?

The shut-off head of 22 ft is the first hard limit; if system resistance reaches that point the pump stops delivering flow even though the 1/2 hp motor keeps running.

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