Know Your Heating Pump

A circulating pump is fitted to move liquids or even gases sometimes around a circuit, that being the central heating system. They do not use masses of energy to do this. The water it circulates right around its circuit and then returns to the pump where it began. If you ever need to replace this pump but are not confident to remove it from your heating system, then it is a best to use the services of a professional plumbing tradesman like a Lee Plumber who knows all about pumps.

The Structure of The Pump.
The pumps that are used as circulating pumps in domestic heating systems in homes are normally compact electrical centrifugal pumps. Their primary role is to circulate hot water as required. The system would not really work without them as the hot water could not circulate efficiently. The three main parts of a circulating pump are:
1). Support Bearings.
2). Pump Impeller.
3). Electric Motor (and Rotor). A Grove Park Plumber can fit a pump.

The electric motor rotor spins the impeller, which pushes the water forward or even upwards. The impeller is vey much a turbine wheel fitted with a series of angled blades. This impeller spins at a really high speed, pushing water out and compressing it. The motor is a sealed unit inside a waterproof casing and is connected to the impeller. Circulating pumps are small enough to be fitted close to plumbing systems, but there are industrial type pumps that have large motors and are usually away from the pipework and system. The circulating pump is very quiet when it runs, but it vibrates slightly which you can feel with the hand.

Bleeding The Pump:
There are occassions when this needs to be done. Firstly, slowly loosen the bleed screw on the side of the pump casing screw until the hiss of the air starts. Do not open fully. Once the hiss stops you may see a dribble of water, then, you should tighten the screw. Job done.”