Combi Boiler Hot Water Pressure Low

Step 1 find your filling loop directly underneath your gas boiler should be some pipework amongst which will be your filling loop.

Combi boiler hot water pressure low. If your pressure gauge is marked with a green zone and the needle has fallen below it this is a sign that the gas boiler pressure is too low and action should be taken. Around 2 bars normal pressure level when your boiler is active heating up. Cold water pressure 11 litres min 2 litres in 11 seconds hot water pressure is only 1 7 litres min 2 litres in 70 seconds if i use more than one tap in the house one complete stops. Low boiler pressure combi and system boilers require a pressure of 1 1 5 bar when cold in order to work.

The filling loop is the silver flexi pipe with either one or two black usually taps on. Ideally the combi boiler flow rate for a good shower should be at least 12 15 litres a minute. Due to high water temperatures. If the pressure is lower than this the boiler won t work and you won t have any hot water or central heating.

Choosing a powerful combi boiler with a good flow rate will help you to optimise hot water pressure around your home. 1 to 1 5 bars on your pressure gauge normal pressure level when your central heating is switched off. The hot water is heated fine the combi boiler quickly kicks in when the water is required if you re patient enough to wait. This can be tricky and occasionally dangerous.

How could mains water pressure affect my combi boiler. Low boiler pressure is one of the most common boiler problems and it can have many possible causes. This is where that filling loop or filling link comes in again. These reasons are simple enough but now you can go through a process of elimination to find out specifically why it s happened.

For all cold mains fed combi boilers it is important to ensure before at the time of installation that the water main is large enough to deliver adequate water to the boiler whilst other cold outlets are in use eg flushing toilets washing machine filling or cold taps being run. Here s a rough idea of the fluctuations in boiler pressure that you really don t need to spend time worrying about. If your boiler pressure reads less than 1 bar it s possible that you might have lost water from the system which needs to be replaced. Low boiler pressure is typically a result of a water leak or recent radiator bleed.

The flow rate simply refers to how much water can pass through the appliance to feed taps and showers once the boiler is working.