Boiler needs topping up every day

Boiler needs topping up every day

One of the most common problems with customers boilers is low boiler pressure. In this article we explore why issues in boiler pressure occur and how to fix a low boiler pressure.

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Boiler needs topping up every day

Why does my boiler need topping up everyday?

Are you finding that you are having to top up your boiler pressure every day? If so, read on to find out what could be causing this system fault and whether you need to call a heating engineer.

What is boiler pressure?

Modern boilers heat cold water which flows around a circuit of pipes and radiators through your heating system in your home. For this to happen the water pressure needs to be kept stable.

How often should I need to top up my boiler?

When the heating system is cold, the pressure should ideally be between 1 and 1.5 bar. If the pressure is too low i.e. below 0.5 bar then water has been lost from your system which needs replacing. If the pressure is too high this can indicate there is too much water in the system. As a first step you can bleed a radiator until the gauge returns to the normal limits of 1 &#; 1.5 bar.

If this does not solve the pressure problem or you are still having to top up your boiler frequently then it is important to get to the root of the cause to protect your boiler from damage.

Causes of a rise in pressure?

Aside from having too much water within your system, high pressure can indicate your expansion vessel requires re pressurising. In this instance you will require a heating engineer.

If you are ever in doubt with any aspect of your boiler or heating system you should ALWAYS contact a registered heating engineer.  It is normal for a heating system to be topped up once or twice a year.  For example this could be done during your annual boiler service. If you are having to top up your pressure frequently then you should call an engineer.

Causes of a drop in pressure?

A loss in boiler pressure can be caused by a variety of things. Commonly a loss in pressure is caused by a leak in your heating system or if you have recently bled your radiators.

Leaking system

Even a tiny leak can cause a large pressure drop if left unnoticed. Noticed a drop in pressure? Have a look around your home for any damp patches around your radiators or boiler. You should never look for a leak inside your boiler only a qualified gas or oil engineer should do this.

Other signs for an ongoing leak could be;

• Mould appearing, rot in extreme cases
• Peeling paint rust marks
• Swelling or bulging of floor boards or ceilings

However, it is not always easy to find a leaking pipe especially if it is behind a wall or panelling.

How can we help?

In summary if you are in any doubt about your boiler pressure you should always contact a registered heating engineer. Failure to do so could result in unnecessary damage to your boiler and heating system which could result in a costly repair. Please also see our article on how to re pressurise your boiler

If you would like an engineer to attend your boiler please call our friendly office staff on or fill in our enquiry form and one of our team will get back to you.

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If your seeing lots of steam out of the flue then thats good, the more the merrier. It means your boiler is working efficiently and condensing for longer, which is good

You may want to set the heating dial ( front of boiler ) to a lower setting. If this is too high that could account for the topping up every month or so. Ever watched a pan start to boil? Small air bubbles created, same effect can occur in your boiler, the auto air vent removes that air, and over time the pressure will drop, you are using water. Different systems use water at different rates they are all different, and used differently.

There are various reasons/faults why a system can drop pressure. But for what your seeing, I would not worry

Mick

ANDARIAL

Nice try m8 nearly there Its a combination boiler ( or any sealed sytem ) that has a copper outlet pipe, that discharges from the prv.. A condensing combination boiler will have this too, and also a plastic condensate pipe...This condensate pipe discharges water under normal running ( heating normally on ).
PRV outlet pipe normally discharges to the ground safely, a condensate outlet normally discharges down a waste pipe or soakaway.

Expansion vessel problems are a different ball game. Start at 1bar, run heating, pressure goes to 3bar, prv dumps water, heating cools at end of cycle, pressure now drops below 1 bar. Instant water loss from one heating cycle.

If your topping up by such a small amount every 5 weeks then I'd say thats not far from normal for this time of year.If your seeing lots of steam out of the flue then thats good, the more the merrier. It means your boiler is working efficiently and condensing for longer, which is goodYou may want to set the heating dial ( front of boiler ) to a lower setting. If this is too high that could account for the topping up every month or so. Ever watched a pan start to boil? Small air bubbles created, same effect can occur in your boiler, the auto air vent removes that air, and over time the pressure will drop, you are using water. Different systems use water at different rates they are all different, and used differently.There are various reasons/faults why a system can drop pressure. But for what your seeing, I would not worryMickANDARIALNice try m8 nearly thereIts a combination boiler ( or any sealed sytem ) that has a copper outlet pipe, that discharges from the prv.. A condensing combination boiler will have this too, and also a plastic condensate pipe...This condensate pipe discharges water under normal running ( heating normally on ).PRV outlet pipe normally discharges to the ground safely, a condensate outlet normally discharges down a waste pipe or soakaway.Expansion vessel problems are a different ball game. Start at 1bar, run heating, pressure goes to 3bar, prv dumps water, heating cools at end of cycle, pressure now drops below 1 bar. Instant water loss from one heating cycle.

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