Posted by in Plumber Talk, on July 3, 2017

We show you how to remove an airlock from a radiator if you’ve followed all the other steps we have on our channel about how to get you’re radiator going, you’ve done your TRV, you’ve done balancing a system, you’ve altered pump speed, you’ve done absolutely everything and it’s still not going your probably going to find it’s got an airlock going to that radiator or that string of radiators if they’re still not working if you haven’t all those things maybe you want to give them a try first. So click on the link that’s appearing now that will take you back to the radiators HUB thats got loads of videos all about radiators. Lets have a look at how we’re going to remove this airlock now. You’re going to need a hose. As I said you’re going to need great nerves! And then we can move on and hopefully get it going. So we’ve done everything we can on this system and this radiator’s still not getting hot Now this could also work for say three or four rads that aren’t getting hot on a certain leg, so it’s always handy to know how to do this. So the first thing we do whether it’s a pressurized system or whether it’s tank fed from the loft is we turn off the valve at each end. That’s the first thing we do. next get yourself a radiator bleed key like this one. Little tip for you if you get one like this get yourself a file and file off the taper. A tub and a cloth and just dissipate the pressure from the radiator. Get a hose. Some radiators will have a built in thread just for the bleed nipple If it’s got one of those you’re not going to be able to do this. So once you’ve got that ready. Get a little bit of PTFE and wrap the PTFE around it after that remove your bleed nipple screw this in a take your hose outside. It should come loose and have a towel underneath something to catch a small amount of water as soon as this comes out you should be able to feel it click if you press on it a bit. Ok thats coming loose now and just a quick change over just like that.mIf you don’t think you’ve got a good enough connection between your hose and your spigot or nipple as we call it get a jubilee clip and wrap that round you move on to the next bit I advise you turn all of your heating system off you go to any two port or three port valves, and if you know how, latch then open, you’ll find little arm on there – just latch that open. Also if you’ve got a pressurized system make sure that you’ve got a reasonable amount of pressure in a normal house that would be one to one and a half bar If you need to know how to top that up, look at our pressurize heating systems video and also if you’ve got a tank fed system from the loft make sure that the ball valve drops down nicely and isn’t stuck up. Once you’ve done that, you’re ready to do the next bit which is actually purging air from the flow and return side of each radiator. What we’re going do now is the flow side you wouldn’t believe how easy this is to do. All you have to do is open the radiator up. You’ll hear air and water rushing out of this large hole we’ve now got here instead of this tiny little hole that used to be here. and that will let any air out. Now sometimes if you’ve had the heating system running already you could open up this valve and feel hot water come through. As soon as you feel that hot water come through I’d pretty much guarantee that you’ve probably removed the airlock. Now hopefully this system here hasn’t got any airlocks in it. So we’re probably not going to hear loads of air coming out but I’m going to open it up anyway and you never know what we might get. Hmm, got a little bit in there! run it seems to have cleared now and it’s quite warm as well so we’ll shut that and then do the other end. So we’ve shut that TRV at the other end and bled that bit of air now we’re just going to do this lock shield side. a couple of blobs of air there. Right so now we’ve purged the flow and the return side of air. of air we’ve got warm water coming through both of those ends. What I need you to do now is shut both of those valves. Remove your spigot and then put back in your air bleed key. Make sure that the system has either topped itself up again so the F and E tank is stopped running or top it up with your pressurised filling loop like we described in our pressurised heating video. Why air got in the system or in that radiator.





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