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This isn't a new cylinder.. it has been in for 10 years (since the house was built), but looking at the nut there is a fair amount of scale around it.

I would hope there is something behind the nut already and it is that thats failed.

I have a pre insulated hot water cylinder with a central heating coin going through it to heat the water. The connection at the top has started to leak. There is a nut that sits directly against the cylinder and seems to hold the coil in place. This looks like where the leak is coming from...

There is no bypass valve installed and nothing between the pump and the 3 port valve. There is a gate valve on the central heating pipe after it leaves that 3 port valve. Should this be fully or only partially open?

No trvs and I have tried the pump on it's slowest setting with no noticeable effect. :(

I originally thought that so I replaced the diverter valve for a second time but it still did it.

yes the water is flowing the right way. Can't think why a pipe would become unclipped by it's self though.

It only does it if the central heating is on. I can cause it to happen myself by opening the central heating switch manually and it will make the noise when it closes the valve. I can't work out exactly where the noise originates though.

It's not the three port valve as I had already replaced that and it made no difference. Its just a single loud 'shudder' of the pipes when the central heating cuts out on the thermostat, almost as if someone has hit the pipe with a mallet. :?: :?:

is there any way to mill a millimeter off of the sink?

I have a problem with the central heating. The boiler is a conventional one (Glowworm Ultimate), not a combi boiler. When the central heating comes on or off the pipes will give a single bang and vibrate a lot as the water starts to flow. The vibration is only a single movement that causes the...

I have a radiator in the bathroom which is fed by 10mm. I am putting in a towel rail as a replacement but the fittings are 15mm. Is it ok to solder a 10mm to 15mm reducer with a very short length of 15mm pipe on it and connect the 15 mm pipe into the towel radiator fittings. Or must I buy new...

I would put a spring washer under the retaining nut mate.

Hi all, I have a Glow Worm 50 ff boiler. I was going to replace the actuator on the three port valve on Monday as that went faulty the other day, but last night a new fault appeared. The boiler now does not light at all. I have checked the main fuse and also the internal fuse in the boiler...