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Q: What is Function of boiler dearating feed tank?
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What is the function of a cold feed and expansion pipe?

Cold feed is cold water that supplies boiler water for heating system. Expansion tank relieves excess pressure buildup in heating system.The Cold feed should enter the supply line rather then the return as not to thermo shock a boiler and the expansion tank is to protect the system from excessive pressureAs water is heated it expands causing higher pressures the tank acts an asorber for this expansion


How do stop a vibration in your feed line from your oil tank to your boiler in your home?

Install an oil shock eliminator


Why must the hot water tank in a house be placed higher than the boiler?

A boiler functions by boiling water to a steam, which rises upwards. Keeping the hot water tank above the boiler helps keep the hot water hot, as well as allowing the steam to carry itself to the tank, instead of the hot water tank producing steam feeding back into the boiler.


Why is the boiler underneath the hot water storage tank?

So the steam can rise from the boiler to the hot water tank storage


What is a tricock valve?

It is a small, valve usually used to manually check if water is above the valve connection on a boiler or tank. There may be several of them at different heights on the boiler or tank. There is a handwheel on the valve, an inlet connection (which is attached to the boiler) and an outlet (usually left unconnected). When filling the boiler or tank, the try-cocks can be left open. Water coming from the try-cock means the tank is filled to at least that level. The valve is then closed.


Is there a hot water tank with a com-bi boiler?

Yes


Why is Expansion tank on boiler is leaking at the air release valve?

It is possible that the expansion tank on a boiler could have too much water and not enough air, causing leaking. To fix this problem, the tank should be adjusted to the right levels of each.


What to do when you lose hot water pressure and only have cold water pressure?

This depends on whether the hot water comes from a combination boiler or from a hot water tank with a header tank feeding it. For a combination boiler the fault would probably be at the boiler, possibly from scale in the heat exchanger. For the system that uses the header tank and a hot water cylinder it could be that the float valve in the header tank is stuck an there for it is not refilling the tank or debris has entered the tank and is blocking the outlet.


What way to connect flow or return from boiler to hot water tank?

You can't because it is non potable water. That is why there is a Watts 9D check valve on your boiler. You need a heat exchange water tank to do what you want.


Does the boiler heat the water at first then supply it to the hot water tank?

No, a hot water tank heats water by itself.


Have a new boiler and new hot water tank but you cannot turn temperature of water down?

If the boiler is feeding the tank as a storage tank then you need a good quality TEMPERING valve and a 27" heat sink loop. If the tank is a stand alone appliance for domestic hot water have the Aqua-stat checked


Is a condensing boiler the same as a combination boiler?

Hi. No, these are not the same thing. A Combi-boiler can be a type of condensing boiler that does not need a tank and just heats the water on demand. A combi boiler can be of a condenisng type - in other words there are combi boilers that are condensing boilers. However, there are many types of condensing boiler that do have a holding tank, so not all condensing boilers are combi-boilers. By the way, if you are looking into a combi boiler, make sure that your installer has factored in your likely hot water usage and that this type of system will supply you what you need even at peak times.