Navien Circulating Pump 30015412A

The Navien circulating pump is the primary water circulation component used across the NCB range of combination and system boilers. It moves heated water around the primary circuit, maintaining flow through the heat exchanger and out to the heating system. The pump is listed under the designations UPM3 15-70, GPA15-7.5 and EU BL.

• Radiators or hot water run cold while the boiler fires and the burner is lit
• The pump is noisy, grinding or humming loudly in operation
• The boiler overheats, cycles rapidly or locks out during a heating demand
• Flow and return temperature difference is excessive across the boiler
• The pump body shows signs of leakage, seizure or a stalled impeller

• Confirm your appliance model and serial number against the fitment list above
• Compare the designation on the existing pump label with the designations listed for this part
• Check the pump head, valves and connections for condition before fitting
• Confirm whether seals or gaskets are required separately, as they are not listed here