Worcester bosch pressure dropping on boiler every day

Is your boiler losing pressure, and you’re stuck looking for answers?

The good news is that only one fault usually causes low boiler pressure.

The bad news is that adding water without fixing the issue won’t solve anything. At any rate — you’re in the right place, as today we explain how to fix low boiler pressure and restore the correct pressure reading.

If your boiler pressure keeps dropping, there’s a good chance you’ve been told to use the filling loop to “top up the boiler”.

Pressure dropping on boiler every day

My advice would be: don’t.

Hopefully, the installer dosed your new boiler system with inhibitor and fitted it with a scale reducer (in hard water areas) and a magnetic system filter.

An inhibitor breaks down any bad particles in the system, allowing the scale reducer to catch them.

Every time you top up the boiler with cold water from the mains using the filling loop, you are diluting the inhibitor that’s in the system.

Here are some of the reasons that result in a gas boiler losing pressure. And of cour

boiler pressure drops only when heating on

combi boiler pressure drops when heating on