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Cast iron circulating pump with flange connections, 115V motor, compact rectangular body

Armstrong Pumps

Armstrong Pumps COMPASS 20 1/17 HP 115V circulating pump 180203-686

SKU CH-VJ5H-X2C5B

Hot water circulating pump with 1/17 hp motor and 115V supply for closed-loop systems

  • Efficient hot-water circulation with 1/17 hp motor
  • Reliable 115 V single-phase operation for standard wiring
  • Cast-iron housing resists corrosion in closed-loop systems
  • Best efficiency at 10 gpm and 10 ft head
  • Direct-drive design reduces maintenance and wear

Armstrong COMPASS 20 circulating pump

The Armstrong COMPASS 20 is a cast-iron hot-water circulating pump rated at 1/17 hp for 115 V single-phase supply. It serves closed-loop hydronic systems in residential and light-commercial installations.

Flanged 1-inch connections

The pump uses 1-inch flanged inlet and outlet with a 6-1/2-inch face-to-face dimension, allowing direct replacement in existing flanged piping without unions. Cast-iron housing resists corrosion in closed-loop water circuits.

Direct-drive motor with no flange kit supplied

A direct-drive motor eliminates coupling maintenance, while the best-efficiency point of 10 gpm at 10 ft head matches typical zone-flow requirements. Flanges and unions are not included, so installers must supply or reuse them.

How it compares

Measured against everything we stock in Coolers & Refrigeration Parts, at today’s prices. Recalculated every night.

Price $385.99
Pricier than about 91% of the 161 comparable items (median $49.99).

Specifications

Product
Brand nameArmstrong Pumps Inc.

Questions about this item

What does the 115V single-phase rating mean for wiring this COMPASS 20 pump?

The pump runs on standard 115V AC single-phase power, so it connects to a regular household circuit without special wiring.

What are the flange dimensions and face-to-face length for mounting this pump?

It uses 1-inch flange connections with a 6 1/2-inch face-to-face dimension, requiring matching flanges on the pipework.

How is the COMPASS 20 installed in a closed loop, and what step is often missed?

Mount the pump with the motor horizontal on the return line, install flanges (not included), and ensure the flow arrow matches system direction.

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