Boiler Pressure Keeps Dropping? Common Causes & What to Do

Boiler Pressure Keeps Dropping? Here’s What You Need to Know

If your boiler pressure keeps dropping, it can be a sign that there is a problem somewhere within your boiler or central heating system.

At British Channel Plumbing & Heating, we provide professional boiler repairs, servicing, central heating and plumbing services across Southend-on-Sea and surrounding areas of Essex.

Most boilers should normally have a pressure of around 1 to 1.5 bar when the heating system is cold, although this can vary depending on the boiler. Always check the manufacturer’s instructions for your particular model.

Why Does My Boiler Pressure Keep Dropping?

There are several reasons why your boiler may be losing pressure. Some of the most common causes include:

A small leak from a radiator, valve or heating pipe
A leaking pressure relief valve (PRV)
A problem with the expansion vessel
Pressure dropping after bleeding your radiators
A leak or fault inside the boiler
A small leak somewhere within the central heating system

Some leaks are easy to spot, but others can be very small or hidden underneath floors or elsewhere within the heating system.

Can I Repressurise My Boiler Myself?

Many modern boilers allow you to top up the pressure using a filling loop or built-in filling device.

You should always follow the manufacturer’s instructions for your particular boiler when doing this.

However, if you are regularly having to repressurise your boiler, continually topping it up isn’t the solution.

A properly functioning heating system shouldn’t continually lose pressure, so the cause should be investigated.

When Should I Call a Heating Engineer?

You should consider contacting a heating engineer if:

Your boiler pressure keeps dropping after you top it up
Your boiler stops working because of low pressure
You notice water leaking from your boiler
A radiator, valve or heating pipe is leaking
Water is coming from the pressure relief pipe outside
The boiler pressure rises very high when the heating is running and falls again when cold
You’re unsure how to safely repressurise your boiler

A Gas Safe registered engineer can inspect your boiler and heating system to help identify the cause of the pressure loss and carry out any necessary repairs.

Boiler Repairs in Southend-on-Sea & Essex

If your boiler keeps losing pressure, isn’t working correctly or you have another central heating problem, British Channel Plumbing & Heating can help.

We provide:

Boiler repairs
Boiler servicing
Central heating repairs
Radiator repairs
Plumbing repairs
Hot water fault finding
Heating system fault finding

Areas We Cover

We cover SS postcodes and surrounding areas of Essex, including:

Southend-on-Sea • Westcliff-on-Sea • Leigh-on-Sea • Chalkwell • Prittlewell • Eastwood • Thorpe Bay • Shoeburyness • Rochford • Hockley • Hawkwell • Rayleigh • Benfleet • Hadleigh • Thundersley • Canvey Island • Wickford • Basildon and surrounding areas.

Need Help With Your Boiler?

If your boiler pressure keeps dropping or you need a boiler repair in Southend-on-Sea or the surrounding Essex area, get in touch with British Channel Plumbing & Heating.

📞 Call: 07453 451 941