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Plumberparts.co.uk, Honest Reviews and Advice
HOLD TIGHT! And welcome to todays Plumberparts.co.uk video that's all about 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 because you do need reasonably good knowledge and balls of steel
to be able to actually to do this particular thing. 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. HOLD TIGHT!
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 because they really get annoying. I put a little tag on mine so
I never lose it. Even though I'm probably still going to. A small tupperware tub and a cloth maybe
and just dissipate the pressure from the radiator.
right once thats finished draining and you've dissipated pressure from the radiator
Get a hose so it will go the normal hose size of 15 millimetre like
this one here
to half inch male thread. Some radiators will have a built in thread just for the bleed ***
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 PTFEand wrap the PTFE around it
after that remove your bleed *** screw this in a take your hose outside. Right have this next to
you at the ready and then unscrew this. It should come loose and have maybe 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. You see that? How quick that was? Like a CAT!
So quick I can't believe myself sometimes!
If you don't think you've got a good enough connection between your hose and your spigot or ***
as we call it
get yourself a jubilee clip and wrap that round there and tighten that up.
before 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 because they can get
stuck up sometimes
and that won't allow any more water into the system. 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. Thats coming through nice and warm now, Thats great.
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. The pressure will dissipate automatically out of your hose
so you don't have to worry about that. Remove your spigot and then put back in your air bleed key. Once
you've done that 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.
before we finish because now you've probably successfully got your radiator going
and you're happy as larry, there's a few things you do need to think about as to why air
got in the system or in that radiator. Reason number one is that there's not enough inhibitor
in the system
and the water is reacting with the metal inside the radiators
and creating hydrogen.
Reason number two is you've got an Automatic Air Vent that is too close to the suction
side of the pump and sometimes they can tend to suck air in through the air vent.
Reason number three is your expansion pipe is on the wrong side of the pump.
sometimes you'll be able to put your thumb over the expansion pipe and feel it sucking your
thumb. Reason four is the pump speed is set too high. Now it may sound crazy but if there's not
enough water being delivered to the pump impeller, IE there's not enough
suction. Then the differing pressures between the suction and the discharge side of
the pump impeller are such that it causes the water to cavitate.
If you want to learn about Cavitation just go online because I can't be bothered to
go into it right now but all you need to know is that it does create air and it
can create airlocks. So make sure that the pump speed is at the right setting.
I hope you've found today's video helpful
I hope that if we haven't covered anything that you're going to tell us and let us know as ever
follow us on twitter, facebook. Give us love through the website at plumberparts
.co.uk
If this video hasn't helped you click on this link and go back to the radiator HUB.
you'll probably find a video there that can
help you out
i'll see you guys all very soon and I hope yet again that you HOLD TIGHT
THROUGHOUT THE NIGHT!
BRAPP TING!!!
Plumberparts.co.uk
Honest Reviews and Advice