A ball valve has a steel ball with slots that match up with hot and cold water inlet seals. They are washer-less, but the steel ball might need to be replaced, which is an easy repair also.

If you are planning on getting a boiler/system fitted or replaced there are certain things that you should keep in mind. One of the first things you should do is find out what type of system you already have installed to make sure you have the requirements needed for your new system. Also you should think about what you want from your central heating system, keeping in mind things such as; do you want instant or stored hot water? Different parts of your house heated independently, if so how many? And do you want your boiler hidden away?Bibcocks

There is no standard Central Heating System, every system is tailored to suit individual needs. Even if you only have a basic system you should still have the power to programme it correctly so that it can look after itself. You should be able to set it on a timer so that it can automatically turn itself on and off. With an advanced system you can take this one step further and have the control to set your Central Heating System so that it keeps your house at just the right temperature and gives you all the hot water that you will need. You should be able to control all of this, with your boiler burning the bare minimum amount of fuel.Pressure Valves

Your Central Heating tank where the water is fed into has a ball valve that is the same as the one seen in your toilet tank. This ball valve is a ball attached to an arm that, when lifted closes the valve, which means when the tank is full no more water can get in because the valve is closed. However when some water is drawn off the tank, the ball drops, the valve opens and more water gets into the tank, this is what needs to be stopped when draining your radiator. One of the best ways to stop this is by placing a piece of wood across the tank and tying the value arm to it, which will close this valve.

When all these precautions have been carried out, you should attach a hosepipe to the part of your radiator known as the outlet and run the end of the hosepipe outside. The water from your radiator will flow through the hosepipe and out of your radiator system. You must make sure before you start cleaning or replacing your radiator that all of the water has defiantly been drained out.Filter Check And Foot Valves

To make your system drain faster you should open any bleed valves on your radiators, starting with the radiators on the top floor and working your way down. When the water is drained off you are free to work on your radiator.The news come from http://www.bossgoo.com/