The water pressure inside a boiler system should normally be around 1 and 1.3 bar. Check your manual to find out its optimum range. If the boiler pressure is too high or low and falls outside this range your central heating won’t work efficiently. That’s the range at which all the components are designed to operate.

Are you wondering what your boiler pressure should be, well read on more, we have all of the answers to your questions.

Is High Boiler Pressure Dangerous?

If you are experiencing high pressure it is unlikely to be dangerous, however as your system should have a pressure relief valve that will trigger it. You shouldn’t rely on this to prevent overpressurisation. It will be efficient and second, it could be dangerous if the relief valve is faulty or jammed.

Signs Your Boiler Is Too High:

Do You Know Why Your Boiler Pressure Is Too High?

The main step is to make sure you check your pressure gauge. The first step is to check and identify the boiler itself. This will take one of two forms which is the analogue which is known as a pointer display or a digital display.

An analogue display looks like a clock face or even a speedometer with a needle pointing towards the pressure. It will have numbers around the edge, but it also should have some sort of indication of where the ideal range is, for example, a shaded area or two lines marking the maximum and minimum pressures. 

A digital gauge will be an LCD, LED or some type of screen type and might be a multi-function. This will then show others information such as timers, temperatures or whether the boiler is servicing central heating or hot water. Sometimes you have to press a button to scroll through different measurements until you reach the pressure indicator.

If you need more information to understand why your boiler is too high, give us a call today and we will come out and check.

How To Reduce Pressure In Boilers?

Once you have diagnosed high pressure within your boiler system, the next step is to reduce it! There are several ways to release this pressure and we’ve ordered them with ease, however, the techniques are not all available to every system!

There are 4 factors to consider when you reduce pressure within your boiler:

1. Open The Filter Valve

Most central heating systems have a filter, which water continually cycles through to remove impurities. They also double up as drainage valves and are perfect for relieving pressure within the system. 

You will normally find the filter near the boiler, as it should be located between the last radiator and the boiler to make sure it is best protected. It will be either conical or cylindrical in shape with a valve at the bottom. You will need to put a bucket under the filter, which then opens the valve and keeps an eye on the gauge. You then close the valve when it reaches 1 bar.

2. Use A Drain-Off Valve

If you don’t have a filter, you might have a drain off the valve. This is located in the pipework for the central heating system. It can be anywhere and there could be several, but if there’s just one it will probably be downstairs.

It will be shaped as a Y or even a T component branching from the pipework, with a valve that might require a spanner to open. You can place a bucket or tub underneath when it opens it up, checking the pressure on the boiler. The same task again is to close the valve when it reaches 1 bar.

3. Bleed A Radiator 

As well as releasing air trapped in the system, bleeding can also be carried out to lower the water pressure. In a short summary, you will need to locate the bleed valve on a radiator, and place a bucket or even a tub underneath or next to the valve. When you do this, water will squirt out so you have to make sure you protect your wallpapers and carpets nearby.

4. Undo A Radiator Nut 

This job is for a specialist and you should only attempt if none of the above is available. You have to place a container underneath a radiator nut that connects the pipework to the radiator, and gently undo the nut with a spanner. You get a much faster flow than with bleeding, so make sure you are prepared for splashing and get ready to tighten up the nut quickly just in case.

Here at MCR Gas we will always help our customers with anything they need. Feel free to get in touch today!