Can you increase water pressure with a combi boiler?

Unlike conventional boiler systems, it is not possible to install a boiler pump to increase water pressure because a combi boiler must take water directly from the mains. If your home is in an area with a low flow rate, the combi boiler will always be limited in the strength of water it can send to taps and showers.

How do you depressurise a combi boiler?

Locate the bleed point on the first radiator usually at the top of the device on one side and have a dry cloth and container handy to catch the water. Open the bleed valve gradually using your radiator key. Some bubby air will come out as well as some water. When the flow steadies close the bleed valve firmly.

Do you lose water pressure with a combi boiler?

But most of the time, it’s an easy fix. Your combi boiler can be losing pressure for a number of reasons. Pressure loss may be caused from a leak in the pressure relief valve, an issue in the expansion vessel, air in your system, or a leak in the heating pipework itself.

How do I increase the pressure in my shower with a combi boiler?

You can boost showers or taps in your home up to the maximimum capacity of your combi boiler. To boost and protect a single shower the best solution is to boost the hot and the cold with the SP22S (gives you two automatic pumps). Each shower or tap you boost and protect needs an extra SP22S.

What should the pressure be on a combi boiler?

What pressure should combi boilers run at? The pressure of your combi boiler should be between 1 and 1.5 bar. If your pressure reads at less than 1 bar, it’s possible that you have lost water from the system via a leak.

When do you need to re pressurise a boiler?

If the pressure of your boiler has dropped, you may need to re-pressurise it to ensure your boiler continues to heat your home and provide hot water effectively. You can check the pressure of your boiler and re-pressurise it yourself without having to call an engineer out.

What do you use to repressurise a combi boiler?

Use a spanner or wrench to turn the valve next to the filling key until you can hear water flowing through it. When the pressure is at 1.5 bar, close the valve with the spanner and remove the key by turning it to the lock position.

How long do you let water in a combi boiler?

Depending on how low the pressure of your boiler is, you should allow water in through the valves for around 10 seconds. This should be enough water to get your combi boiler back up to pressure again. If it takes longer than this, you could have a leak in the system.