First of all, the easiest option is from a towel rail. So I’m going to do it from this towel rail here. And what we’re gonna do is turn the valves off at the bottom. I’m going to take the pressure out of the towel rail, and then we’re going to add some inhibitor into this.
And then what we’ll do is we’ll have some other different options on how we can add inhibitor if you had a normal radiator or different types of radiators. So let’s have a look at the inhibitors now and then we’ll make a start.
When it comes to the inhibitor that we’re gonna add to the heating system, it’s cheaper if you can use a bottled version, so any of these bottled versions are cheaper. Often it’s easier to use one of these express cans, but they’re quite expensive, so it just depends which one will serve you best for the job that you’re doing.
So, on this particular one at the moment, we’re just gonna use one of these bottles and we’re gonna pour it into top of one of these radiators or into the top of this towel rail. so we’ll do that now and then I’ll show you how to inject it into a filter with some filter fluid, and then also how to inject it into a normal radiator, if you just got a normal radiator. Fernox F1 , Adey MC1 , Sentinel x100
So the easiest option, when possible, is to add chemicals into a towel rail, and what we do with that is these valves at the bottom, so we turn the valves off. So to turn them off, you’re gonna be turning them clockwise. And you need to make sure both of the valves are turned off. Now, just be careful because sometimes these valves have spinning tops, so you might think it’s turned off and it might not be. So then what we’re gonna do, we’re gonna just bleed the pressure out the top, and then once we know that that’s stopped, we know that it’s isolated and we know that these have turned the pipes off to the radiator. So then we can drain some of the water out of the radiator and then we can add the inhibitor into the top of the radiator. So I’ll do that now.
I’ve got my bleed key and I’ve got a bit of a rag. So what I’m gonna do now, I’m just gonna bleed this radiator. And all we’re doing now, we’re just letting the pressure out. So just open that. You’ll see a bit of water there. And now that’s stopped, so we know that when we’ve turned these valves off at the bottom, we know that they have isolated the radiator. So for now, I’m just gonna close this drain pipe back up and now I’m gonna get my tub. Gonna put it underneath the radiator valve and I’m gonna drain the radiator down. And then we can open the bleed point to control the flow of water coming out. So I’ll do that now.
So to drain this down, I’ve just got myself a plastic tub. So I’m just gonna put that under there. So what we’re doing now is we’re gonna drain the radiator down. We’re not draining the full heating system, just the radiator. So all we need to do now is undo the nut. And there shouldn’t be that much water comes out, to start. So very little water has come out of there. And then what we do then is we get this bleed key and as we open the air vent at the top, we’ll see water coming down into the tub. So what it’s doing now is, it’s letting air into the radiator. By letting the air into the radiator, it’s letting the water come out at the bottom.
So to control it, as we open it, we’re letting it in quicker. And obviously, now it’s starting to splash, so we can control that just by closing it a little bit. And that will just slow it down so it’s not splashing all over. So we only really need to get enough out in water as the inhibitor that we’re gonna put back in. But I’m gonna drain most of this out on this radiator. You may find that once you’ve done this job and you’ve put your inhibitor into the system, you might then have to go top the boiler up. So I’ve done another video on how to repressurize your combi-boiler. Depending on which boiler you’ve got. There’s all different options on there. So you can have a look at that, then. That will help you with that.
We’ve removed enough of the water out of the radiator now. So now I’m gonna connect the valve back on, onto the bottom of the radiator. So we just need to tighten this back on. What we don’t want to happen is we pour the inhibitor in the top and then it comes down and out the bottom. So that’s all tightened back on now. So now I’m just gonna take the air vent out at the top. I’ll do that now. So I’m just gonna close this bleed point on top, just so that I don’t forget it later. And I’m gonna remove