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Thanks for the tip, problem solved. Only had to give it a tiny nudge and the humming stopped straight away

Had to Google it, might be wrong but i think it's the white knob in the photo. Seems like it bypasses the hot water valve, not sure if that's normal. But no it hasn't been altered. What's the link between the bypass and vibrating pipes?

I had to drain and refill the system a few weeks ago. Since then we're getting a loud humming noise coming through the pipework, but only when the heating turns off and the boiler goes into overrun for a few minutes. Have bled all rads repeatedly, no trapped air. Tried x200, didn't help. Any...

I'm building a lean to shed and planning on installing an edpm roof. The roof leans onto a pebbledash wall and I've been a bit concerned that the contact adhesive won't be strong enough for the upstand on that surface, so rather than chase out all the pebbledash another option I was thinking of...

I'm planning on building a lean to shed over our side return path, which has block paving that extends to the rear patio. At some point in the future I'll need to get a mini digger through it for some garden landscaping, so I'm thinking that rather than building a raised timber base it would be...

Thanks for the help. They suggested faulty gas valve is most likely but I'm going to get in touch with the manufacturer, see what they think. It's a 4 bed house. Planning some major work next year which will need the boiler to be moved so will probably replace it then, so I'm hoping I won't have...

HW can be on on its own without any noises. It's only when CH and HW are on then CH goes off. Haven't tried CH and HW on and HW going off. I moved into the house earlier this year but it looks like the boiler is 11 years old, and it has been serviced regularly, but not sure if they were full...

That's right - there is demand for both then i turn the room thermostat down so CH goes off. If just CH is on and i turn it off then i don't get the noise. Not sure what they did for the service - it was just an annual boiler service and i left them to it. They mentioned all the stats it's...

Last week. I asked them to service it and look into the noise but they didn't hear it so asked me to send them a recording instead. When they were here the boiler seemed fine as far as they could tell (and it was a GSR) Does the fact that it seems to happen when it goes from HW + CH to just HW...

My Worcester cdi 30 conventional boiler makes this very loud noise frequently, sometimes vibrates the house: https://drive.google.com/file/d/1De7RBrHgAUM25bksHJhIfP0Ue_y9s_5a/view Not sure what's causing it but I've been able to make it happen by having both heating and hot water on at the...

The top layer that is flush with the floorboards is mortar but below that it's concrete - you can make out the stone in the section under the lifted floorboard in the first photo. Maybe there's more mortar below that though. If I was to stitch drill and chisel it I guess I would need to expose...

If it is the bottom of the upstairs chimney breast and it never extended into the dining room then that would explain why there are no hollow sounding parts to it. But I still have the same worry about how it's being supported and whether it's a danger.

Yes it was an internal chimney but I'm not sure whether it extended to the ground floor. There is original parquet floor under the carpet below it, and the plans of the work don't show a chimney breast. They do show something on the other side of the removed wall which possibly could have been a...

I moved into a 1930's house in April and was curious about a rectangle shape showing in the dining room ceiling. I noticed on the original plans that there used to be a chimney breast there so I pulled up the carpet in the bedroom and found a large concrete hearth base. I pulled up some nearby...

It's this: https://www.screwfix.com/p/fluidmaster-button-cable-dual-flush-bottom-inlet/58353 I could get a new one but this is supposed to be 2" compatible so maybe i'm missing something... or maybe it just means that it fits in a cistern with a 2" outlet hole, not that it will connect to the...

I need to connect a 1.5" dual flush valve outlet to a 40mm water pipe leading to the toilet bowl, but can't see how to do that. I'm replacing an old valve that has a 2" outlet which this new one says it's compatible with, but that just seems to refer to the alternative washer it has that fits...

As in the original post sludge was coming out of the pipes in the bathroom. Just to update, I lost patience with the x400 so drained, refilled and flushed. Noticed there was very little flow when flushing rads from bathroom onwards. Treated with ds40 for 24 hours after vaillant confirmed no...

Yes i mentioned earlier that I'm going to let the x400 work and if no improvement I'll try x800, though I'm thinking ds40 might have a better chance. Anyone have any opinion on whether a grundfos vp5/2 in a turbo max 824e can be replaced with a ups2 15-50/60, without replacing the whole body...

I'm thinking of replacing the pump too once i've cleaned everything out, just to be sure. Not sure how old the current one is but I don't think the previous owners did much maintenance so it's probably at least 8 years old. It's currently got a Grundfos VP5/2, does anyone know if I can just...

I'm not, but as I understand it it's difficult to say whether there's an issue with the pump while i know there's still sludge in the system, so i'm focusing on that for now. If I were to think I've got the sludge / blockage out and it's still having trouble heating these rads (closing off all...