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Hi Folks, I've had 2 litres of sentinel x800 in our 21 rads for a week now and some are still noisy and crackle when the heating comes on but stop after about a minute or so. This wakes me up at 5am every day. The x800 seems too have made no difference. Do you think its air? The problem...

Hi, The south facing part of our house is the coldest as there is no insulation. We have had companies come and look to insulate it but they just don't want to know as access is almost impossible. Does anyone know where it is possible to hire a machine to pump insulation in? We are based...

Great advice. I'll open the near(ish) manhole cover. I think if there are pipes there then they are redundant now. Thanks. :)

We started digging down... I'm going to do this all the way around making sure the water runs off. If it helps we'll add some pebbles as a french drain. There is a block of concrete to the left. I don't know why but I think I'll have to hire a machine to get it out. I think we have got to the...

Ah it'll be the lock shields. FFS this is a nightmare. It's taken me MONTHS to balance this damned system so I don't want to touch those. Aaaagh..... The only reason I'm doing this is because one of the rads in the bedroom wakes up up every morning chugging and gurgling at us but there doesn't...

Two of the downstairs ones are open... all the other leak if I open them. :( 21 radiator system. Maybe I'll just leave it dribbling... :S It should be faster though.

Hi, I have found two points to drain our heating. Its been nearly two hours now and water is still very slowly dribbling out. It's a sealed system and the upstairs rads are empty but the downstairs ones are full still. All the upstairs bleed valves are open?! Why the heck is the waster so...

Maybe I should try and pour it in an upstairs radiator that is more likely to be empty. The valves are open. Thanks for all your help. I've failed at this twice now and had to fill it back up again let alone wasted half the inhibitor. I said inhibitor but I'm actually using cleaner as two of...

I opened both bleed valves on one rad and it just came out the other one. With just one bleed valve open it wouldn't go in as there is air inside and just went all over the floor. :(

Yeah I wondered that. I tried to pour it in the bleed valve but it just poured all over the floor no matter how hard I pushed the nozzle in. God this should be so simple. What other options do I have I just can't see where else I can add it? Cut my losses chuck the liquid away and use a...

But if the mains water passed though the valve when open why can't the inhibitor? :S

What's the check valve? I tried to squirt it in a radiator and it just p!ssed out everywhere but in the hole. Maddening.

Huy Guys, Heeeeeeelp!!! I have one of these; and one of these; to dose the sealed central heating unit. I have emptied the entire system of water.... I then attach the bottle to the dosing kit and screw it onto the filling loop. I then open the valve and it will NOT go in...

Thanks John, really helpful. There could be a bad tile above the wall as its about a foor thick. I'll get up and have a look. There was indeed an old boiler near there once so I'll look into the possibility too and try the condensation idea. Wonderful thanks.

What do you think we should do? Dig away the ground at the base of the wall to see if that helps? If not re-render? And if that doesn't work dry line/plastic cover the inside of the wall?

There seems to be tarmac butted up to the brick. Do you think it would help to dig some of that away? Saying that the damp on the inside is higher than the tarmac. The floor inside is about the same height as outside.

You are right the pointing is not great in places. We had a damp company come to look some time ago and they seem to think it has had DPC's three times already. I didn't want to spend money doing something again that probably hasn't worked great. I think the DPC is under the top angled brick...

Thanks for the helpful info. The wall is about a foot thick roughly. I don't think the gutter is dripping down but I'll have another look when it rains next.

None around that area. Thanks for the ideas. Some of the outside plaster is blown. The morons we hired to fix it just did the worst patches and didn't redo the whole lot.

More likely me after a few beers as we don't have a dog. There's the solution... cut down on the beers... There is no cavity. Solid victorian brick (it was an old school). Anyone have any other ideas? :)