What’s Inside a Boiler? - Part 2: Pressure Relief Valve If your boiler pressure keeps dropping, you keep topping it up, or you have water dripping outside from a copper pipe, the PRV is one of the key things to check properly. It is a safety device designed to protect your boiler and heating system from dangerous pressure levels, but once it has opened, it can sometimes fail to seal again. In this guide I’ll explain what the PRV does, why it activates, why it can start leaki

A boiler service is not a magic wand . It’s not a fault call out, and it’s not automatically carried out because something is broken. A boiler service is a planned, preventative process  designed to check that your boiler is operating safely and within the correct parameters. As heating engineers, our primary responsibility during a boiler service is safety first , followed by monitoring how the boiler is currently operating and spotting early warning signs before they turn i

What’s Inside a Boiler? Series - By Terry Matthews Part 1: Expansion Vessel If your boiler pressure keeps dropping, swings up when the heating is on, or you’ve noticed water dripping from the copper pipe outside, the expansion vessel is one of the first things to suspect. It is a really common cause of pressure issues in combi and system boilers, and if it is left, it can trigger the PRV and put strain on other components. This guide explains what the expansion vessel is, wha

Powerflushing done properly by Terry and the Team at Smart Heat Experts Haywards Heath, covering mid Sussex

Last updated: 2 February 2026 If you’ve seen headlines saying gas boilers are being “banned”, or that you’ll be forced into a heat pump, you’re not alone. I hear it weekly from homeowners across Sussex. Here’s the straight answer. You do not need to panic, you do not need to rip out a working gas boiler, and if your gas boiler breaks you can usually replace it with another gas boiler. This article is not anti heat pumps. We install and service them too. It’s simply about cutt

If you’ve noticed your combi boiler struggling to provide consistent heating of hot water this winter, you’re not alone. Many homeowners...

Burst water pipes are one of the most stressful emergencies a homeowner can face. Acting quickly and knowing the proper steps can save...

Is your heating system working as it should? How about test it now before the colder months set in. Heating issue or your heating not...