Radiator leaks can happen to the best of us, even the hardiest of plumbers can sometimes suffer from their radiators leaking. In this blog I will be explaining some of the methods in place to prevent your radiators from leaking in the future, and some quick fixes in case the worst happens to you.

First of all, if you want to fix the problem as professionally as possible, you must first diagnose where about the leak is coming from in the radiator. It’s no good just stating that there is a leak. Different fixes are available for different areas in where the radiator is leaking.

If your radiator is leaking from the spindle, the most common method to repair the leak is to use a spanner and tighten the gland nut. If the leak still persists, undo the nut and wind PTFE tape (Polytetrafluoroethylene) down into the spindle. This waterproof tape will provide a quick fix to the leak is the nut has split or is loose at all. Of course it is best to get a qualified plumber to assist you in the repair of your leaking radiator as this will minimize the risk of a leak in the future.

If you suspect there is a leak is at the coupling to the pipe, once again tighten the nut gently as that may be all that is required. If that does not fix the leak, it is best to drain the radiator, then undo the cap nut, take off the fitting and replace the olive. To maximise the effectiveness, you should smear the olive with a silicone sealant before retightening the cap nut back into place.

Some leaks are caused by corrosion. Sometimes rust or water inside the pipes has gone stagnant and begun corroding the pipework, therefore creating the leak. If your pipework in the radiator has any signs of corrosion, the best course of action is to replace the radiator completely. This is the best method as it’s hard to determine how much of the pipework has begun corroding from the inside. If you require an emergency or temporary repair, it can be done using a plastic resin filler. If you need to replace the radiator, turn off the valve at each end which will then allow you to remove the top cap which holds the lock shield down.  Then you can fit a key onto the top of it and turn the manual valve at the other end. You can now remove the radiator and replace it. If you want to remove as much of the corrosion as possible, use wire woo to clean the corrosion from the threads of both adapters and blanking plugs.

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