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Noritz NPD231 Circulation Pump W/Impeller

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Special Price $317.13 Regular Price $352.02
In stock
SKU
NPD231
The NORITZ NPD231 Circulation Pump with New Impeller is a fluid-movement component used to ensure the continuous flow of water in a heating-water loop in HVAC systems. It works by pumping water ensuring uniform distribution of heat, and eliminating stagnation. It is normally fitted on residential and commercial boilers or water heaters and is part of the circulation system that assists, in regulating the flow and maintaining a constant system pressure. Its operation enables it to contribute to the stability of the temperature, effective heat exchange, and stable operation in general.
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HVAC Controls & Electrical, Pumps
Manufacturer:
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Product Questions (2)
Customer Questions
What maintenance is required for the Noritz NPD231 Circulation Pump?

Regularly inspect the pump assembly for leaks, debris buildup, or unusual noise. Clean the impeller and housing to prevent clogging and ensure smooth flow. Check that electrical connections are secure and free from corrosion. Always disconnect power before servicing.

What are common issues with the Noritz NPD231 Circulation Pump?

  • Reduced water flow due to impeller blockage.
  • Excessive vibration or noise during operation.
  • Leaks at seals or fittings.
  • Motor overheating or failure.
  • Loose or corroded electrical connections.

Installation Steps

Step 1: Turn off power and shut off water supply to the unit.

Step 2: Relieve system pressure and drain water from the pump area.

Step 3: Disconnect wiring and plumbing connections from the old pump.

Step 4: Install the new pump with the impeller aligned correctly and secure fittings tightly.

Step 5: Reconnect wiring and water lines, restore power and water, then check for leaks and proper circulation.