Why Your Worcester Boiler Might Be Leaking – Common Causes & How to Fix Them in South Birmingham
If you’ve noticed water pooling under your Worcester boiler, you’re not alone. A leaking boiler is one of the most common call-outs for our engineers at Afterglow Plumbing and Heating, especially in areas like Kings Heath, Moseley, Selly Oak, Bournville, and Solihull. Left unchecked, even a small leak can lead to major problems — from corrosion and pressure loss to complete boiler breakdowns.
In this guide, we’ll explain the most common places Worcester boilers can leak, why annual boiler servicing can help prevent leaks, and when it’s worth replacing your boiler instead of repairing it.
Common Places Worcester Boilers Leak From
Boilers are complex systems with multiple potential leak points. Based on our work across South Birmingham, here’s where leaks most often occur.
The first is the pressure relief valve (PRV), which releases excess pressure from the boiler to keep it safe. Leaks here are usually due to the system being over-pressurised, a failing expansion vessel, or limescale build-up. We check your system pressure, test the expansion vessel, and replace the PRV if needed.
Next are pump seals, which circulate hot water through your heating system. They can leak as the seals degrade over time, especially if the water quality is poor or there’s sludge in the system. The solution is seal replacement or pump change, often paired with a system flush.
Another common problem is the heat exchanger, which transfers heat from the burner to the water. Corrosion caused by untreated water or age is a frequent culprit, especially in boilers over 12 years old. In some cases, replacement is possible, but in older boilers, a new installation is often more cost-effective.
Finally, leaks can come from the pipework and joints, which carry water around your heating system. Loose fittings, corrosion, or freezing during winter can cause problems. Fixes include tightening joints, replacing sections of pipe, or insulating exposed pipework.
Why Annual Boiler Servicing Can Prevent Leaks
Many boiler leaks start small — a slight drip or hairline crack — but go unnoticed until major damage occurs. Regular servicing by Afterglow Plumbing and Heating in Birmingham and Solihull helps to spot early signs of wear before they turn into leaks, check water pressure and adjust it to safe levels, inspect seals and washers for deterioration, flush sludge and debris to protect the heat exchanger, and test the expansion vessel and PRV for correct operation.
For just a fraction of the cost of a repair, a yearly service can extend your boiler’s life and reduce your heating bills.
When to Consider a New Boiler
If your Worcester boiler is over 15 years old and starting to leak, repairs can quickly add up. New boilers are far more efficient, quieter, and come with up to 10 years’ manufacturer warranty.
At Afterglow Plumbing and Heating, we offer expert boiler installation in Kings Heath, Moseley, Selly Oak, and across South Birmingham. We supply and fit Worcester Bosch, Baxi, Ideal, and ATAG boilers, offer flexible finance plans to suit your budget, and take care of the removal and recycling of your old boiler.
Need a Boiler Leak Fixed in South Birmingham?
Whether you’re in Bournville, Harborne, Acocks Green, or Solihull, our Gas Safe registered engineers can be with you fast to diagnose and repair your leaking Worcester boiler. We also provide annual servicing to keep your system running safely and efficiently.
Call Afterglow Plumbing and Heating today on 07826924462 or book online for a fast, reliable service.
