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Many valves are used to control and isolate water supplies and the majority are normally made from brass and that is why plumbers call them brassware. There are valves that have a chrome finish. These types of valves will isolate water supplies so that maintenance and repair work can be carried out on the plumbing without having to drain a whole system. It is good practice to turn valves off and then on again every now and then to keep them in good working order. Chingford Plumbers use skilled technicians, familiar with all appliances. Here are some Valve Types:Ball:This valve contains a ball with a hole drilled through its centre mounted in the supply line. The ball can be turned 90 degrees allowing for the water to flow or not. When the hole through the ball is in line with the pipe work, the valve is open and when the hole is at right angles it is shut. This makes it easy to see whether the valve is open or closed by checking whether the lever or screw head slot is in line with the pipe or across it. A ball valve can be seen on the supply to a washing machine. Always call an expert like a Chingford Plumber.Stop:This controls the supply of water to your property. This valve will isolate the supply to the house. It is always a good idea to locate and label your incoming mains water stop valve. Gate:These valves use a wheel on the spindle which pushes a wedge shaped piece in/out to open or close off the supply line and are installed on a low pressure supply. This valve can be used to isolate the supply of cold water to the various cold water taps in the house. If you are replacing a cold tap in the bathroom, for example, this will be the valve that you use to stop the water, assuming the tap is fed by the cold water storage cistern and not from the main.