Repressurise Your Combi Boiler Gauge

The Combi Boiler stops producing hot water when the pressure gauge has dropped too low; this is a very common problem in households with combi boilers.

 A drop in pressure can be frustrating in cold temperatures and can cause water pipe cracks over an extended period of time. Filling the pressure is a quick and simple process; follow these easy steps on filling the pressure on your combi boiler.

1.    Observe the pressure gauge, it will have an arrow displaying the water pressure level and a red arrow on the boiler will indicate the minimum and recommended pressure level. Your pressure gauge will be at zero.

2.    Apply the filling loop to the combi boiler by turning in the screw caps onto the two filling loop valves situated on the side or under the combi boiler. The filling loop comes with the boiler but it not attached. It is silver and flexible with screw caps.

3.    Turn the first filling loop valve open and the second valve. You should be able to hear the water flow in and see the pressure gauge rise. The filling loop valve controlling the flow of water should be opened slowly so you can control the pressure rise accurately.

4.    Turn off the filling loop valves when the water pressure reaches a little over the red arrow on the outer measurement of the gauge. This is usually a little over one bar on the pressure gauge.

5.    Remove the filling loop with a cloth or cup to catch the excess water discharge, which is a small amount. Filling loops are not meant to be left attached to the valves and combi boiler.

6.    Cap off the filling loop valve connected to the combi, this is attached to the valve.

Observe the pressure gauge after using hot water to see if it drops, if it continues to drop after several uses fill the pressure again and find the bleeding radiators in the household causing the leakage.


Video Guide To Repressurise Or Fill A Combi Boiler Or Sealed Central Heating System