Bell & Gossett 172703LF 603S Series 60 Pump

Keep secondary boiler circulation moving with Bell & Gossett 172703LF 603S, a 1/2 HP Series 60 pump for medium-head hydronic loops. Its single-phase wiring options suit a range of residential, multifamily, and light commercial service panels, while permanently lubricated construction removes routine bearing-oil service. Fill the loop and purge air before startup. A pump that starts with trapped air may produce rattling, poor circulation, and premature seal wear.

The motor accepts 115 or 208–230 V single-phase power and uses a mechanical Buna/carbon-ceramic seal. The listed 1-1/2-inch by 1-1/2-inch by 5-1/4-inch pump size identifies the supplied connection and body configuration. Flow, head, pressure, amp draw, and self-priming details were not provided, so confirm the operating point, piping orientation, and electrical selection before installation.

Key Features of Bell & Gossett 172703LF 603S

- 1/2 HP motor for medium-head hydronic circulation.
- Single-phase operation.
- 115 or 208–230 V voltage configuration.
- 1-1/2-inch by 1-1/2-inch by 5-1/4-inch pump size.
- Mechanical Buna/carbon-ceramic seal.
- Permanently lubricated maintenance-free construction.
- Series 60 design for secondary boiler loops.
- SKU 172703LF and model 603S for replacement verification.

Why the Bell & Gossett 172703LF 603S Stands Out

The 603S reduces routine service work through permanently lubricated construction. Its single-phase voltage options also give contractors more flexibility when replacing a compatible circulator in an occupied building or existing boiler room.

- Build: The mechanical Buna/carbon-ceramic seal and maintenance-free lubrication arrangement suit hydronic circulation; housing material and enclosure rating were not supplied.
- Value: Less lubrication work can shorten maintenance visits, provided the pump stays within its design conditions and the loop remains free of debris.
- Audience: Useful for hydronic contractors, boiler service companies, multifamily maintenance teams, and facility engineers.

Applications & Use Cases

Apply the Bell & Gossett 172703LF 603S to secondary boiler loops, heating-zone headers, radiant circuits, and medium-head hydronic distribution systems. The supplied pump size is 1-1/2 inches by 1-1/2 inches by 5-1/4 inches, but unit weight and port-to-port reach were not listed separately. Check valve clearance, connection details, electrical access, and service space before installation.

Warranty & Support

- 1-Year Limited Warranty, subject to the manufacturer’s applicable terms, installation requirements, and authorized-claim procedures.
- Verify SKU 172703LF and model 603S against the existing pump nameplate before ordering.

Fill and purge the system, clean the inlet strainer, inspect the mechanical seal for weeping, and verify that the selected voltage matches the field wiring. After startup, listen for air noise, check vibration, and confirm the motor is not overheating under normal loop conditions. Purchase the Bell & Gossett 172703LF 603S Series 60 hydronic circulating pump through the store domain associated with this listing for authentic equipment, 1-Year Limited Warranty coverage, and pump assistance.