Alpha 1.015610 CB CD Complete Pump
This Alpha Circulating Pump 1.015610 ensures hot water is circulated around the boiler and out to the central heating radiators and towel rails within the property. This replaces part No. 6.5628910, 6.5611791, 6.5640840.
This Alpha Pump is designed to circulate water around the boiler via the main and plate heat exchangers, the water that is circulated is heated up and then transferred to the central heating radiators within the property or to an hot tap if opened. This pump is supplied with 240V direct from the printed circuit board and runs all the time the boiler is running.
The term OEM stands for "Original Equipment Manufacturer" this part is an original part and was bought from the Original manufacturer of the part.
What does that really meanr a boiler manufacturer such as Wocester Bosch, Baxi, Glowworm etc.
Below is an example:
Gas Valves on most British Gas Boilers are made by Honeywell, Sit, White Rogers etc. This means that these manufacturers are the OEM for the Boiler Manufacturers, so as long as the original part is purchased (Honeywell, Sit, White Rogers) from the OEM it can be sold as an original OEM product.
OEM parts are also referred to as After Market Parts.