How to Fix a Leaking Radiator

Is there anything else more frustrating than getting home after a long day at work, only to find a pool of cold water surrounding your radiator? Ok, maybe puppy training tops the list, but still, a leaky radiator is something that happens to the best of us yet proves to be an annoying convenience in our already very busy lives.

Puppies aside, if you find that there’s a wet patch near your radiator, then you don’t need us to tell you that it’s most likely a sign of radiator leakage.  In situations like these, it is of the utmost importance that you take action as quickly as possible in order to prevent your floorboards or carpet from being damaged.

Fear not, as the team at Great Rads will be telling you exactly how you can identify whether your radiator is leaking or not and how to fix it so that in no time, you’re able to feel the warmth in your house, especially during those chilly mornings, without having to worry about how much water you’re losing in the process.

Identifying and Fixing a Leaking Radiator

A radiator can seep out from countless places, which is why the first thing that you’ve got to do is identify exactly where it is leaking from. Doing just that is not rocket science and doesn’t require any fancy equipment – all you need is some toilet roll to hand. Simply begin with drying the radiator entirely and then place the roll all over its fixtures. The part that soaks the toilet roll is the source of leakage – it really is that simple.

More often than not, it is the body, valve or pipe joint from where a radiator leaks. So, below we’ve mentioned ways in which you can stop the seepage from occuring.

Leakage from the body

If you happen to find out that your radiator is leaking from its body, then we’re afraid that you might have to completely replace it as this is caused due to corrosion. Nonetheless, why not see it as a good thing – you can finally purchase that designer radiator you’ve wanted for so long! Investing in better heating solutions for your home can never be a bad thing – unless you’re the kind of person who feels right at home in artic conditions that is…

But in the meanwhile, to tide you over, there certainly is a short-term measure which you can rely on. If you’ve got an expansion and feed tank, then simply affix a plastic resin sealant to stop the water from flowing out.

Leakage from the valve

Speaking of leakage from your radiator, it’s not always from its body - at times, water might seep out from the valves too. This occurs mainly because of damage caused to the radiator’s internal spindle packing, where water leaks when the valve is partially opened and stops when it’s closed.

This being a straight-forward issue, you can fix the leakage by yourself. Simply follow these easy steps:

  • Firstly, you’ve got to completely drain the radiator valve.
  • Next, close both the supply, as well as the lockshield valve.
  • Once that’s done, make use of towels and buckets to collect the water.
  • Then look for a union nut and loosen it with the help of a spanner.
  • In order to discharge the remaining water, open the bleed valve.
  • Only after you’re sure that the valve is drained, utilise PFTE tape and cautiously cover the tip of the valve.
  • Later tighten the union nut and open up the valves.
  • Allow your radiator to refill; only when you’re completely sure that the leakage has stopped should you close the bleed valve.

Leakage from the pipe joint

Do you have a compressed heating system? If you do, then it might have a number of joints connecting the pipe to your radiator. When the joint gets damaged, your radiator starts leaking. Well, to fix this problem, all that is required is a spanner. But if this doesn’t work, then follow the steps mentioned below:

  • Before you do anything, empty the radiator.
  • Then with the help of a spanner, loosen the nut.
  • Once you’ve removed the nut, use PFTE tape to cover the area where the joint meets the face of the olive.
  • Later fix the nut with the help of a spanner.

Preventive Measures to be Taken

It goes without saying that you’d never wish to go through the process of fixing a leaky radiator, but for that to happen, you’ve got to ensure that you’re frequently cleaning its water.

You must also keep an eye on hose connections - the ones joining your radiator with the heating system, for signs of breakdown. It’s always better to identify problems beforehand to avoid any kind of leakage. Prevention rather than cure, after all.

Though fixing radiators is quite frustrating, it isn’t as difficult as you may think. If ever you have to replace a valve or the entire radiator, take a look at our wide range of products. We’ve got an array of collections from chrome radiators to electric column radiators, along with the valve fixtures required to get them up and running.

Additionally, we also offer underfloor heating systems to help you keep your feet nice and toasty during those dreaded winter months.

If you need help with intricate radiator problems, then get in touch with Great Rads today to ensure your home is as warm and leak-free as it can be.


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