Posted on: 2014-09-14 10:51:48
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Common Valve And Pump Issues




Central Heating Control Valves are electrically powered. If you need to replace a valve, first check that the control unit, power supply and wiring are all working correctly. Some systems are fitted between two large service valves. This is very useful in that you don't have to drain the entire central heating system to take the pump out. These make it easy and convenient to change the pump and can be inspected easily. Waterloo Plumbers only use skilled people. There are generally two types of Central Heating Pump: a single speed (fixed-head), and variable speed. While a variable speed unit is slightly more expensive, it is considerably more flexible than a single speed pump and well worth the extra cost. To adjust the speed of a central heating pump, there is usually a small rotary switch. Some pumps require you to remove a cover or use a very small screwdriver or allen key. When a Central Heating Pump sounds like it is working fine, yet one or more of your radiators stay cold, it is possible that there could be an airlock inside the pump. Firstly, locate the pump and its the bleed screw. Put a bowl underneath the pump and open up the bleed screw with a bleed key. This will allow the air to leave the pump. Once water is sighted at the screw you can re-tighten the screw and test the system. Another Cause could be that the small feeder tank in the attic is running dry and letting air into the system. A Waterloo Plumber can replace pumps and valves. There are occasions when the rotor in the circulating pump sticks, and although you can feel a little vibration through the pump, the actual motor will not be spinning. Some pumps have a cover screw that can be removed to access the pumps spindle. Turn the spindle with a screwdriver until it moves freely. Sometimes the pump impeller can jam due to scale in the pipework so the system will not heat up. The first thing to do is take a quick look to see if this is the case, if it is, remove the pump and debris, then refit the pump.



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