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We'll do just that. Thank you!

Does that black knob just unscrew? It doesn't seem to want to move. It's all very clean so I don't think it's been leaking at all.

Thanks for the advice Gasguru. The radiators haven't been flushed for the 20 years we have been here and the lower ones have gradually got colder. We haven't changed anything in that time, so we think it deserves to be cleaned out and new inhibitor put in.

We're going to flush out our radiator system as it hasn't been done for many years and the radiators are not all heating as they should. We are quite happy with the procedure and have Sentinel chemicals ready. There's just one question that I hope you can answer. There is a bleed valve on one...

Yes, masking tape does the job perfectly well. It's just too much trouble to move the PIR's.

Only buy your cameras from an authorised UK supplier, or they will be unsupported. There are stories of fake items sold on eBay. There are a number of suppliers who sell retail, their prices vary considerably. Google "Hikvision authorised UK suppliers" The Hikvison iVMS software is free, you...

Flash has gone. Finished. It's not an elephant in the room or a mouse behind the skirting. We haven't used it for years. Our Hikvision cameras are connected to a Hikvision NVR. It doesn't use Flash. We access the NVR with apps created by Hikvision. They work on our Windows desktop, a Windows...

I can monitor, control, and playback video from our Hikvision cameras using their own apps on Windows, Android and Apple. What is missing?

securiam is being very polite, but you really must understand that you are being unrealistic. You can't use a camera looking through a window if you expect good pictures. A PTZ allows you to zoom in for recording, but it will have to stay zoomed in. So you will miss the wider picture. You...

Then just use the browser you used to use, rather than Google Chrome. And no, I don't waste money on overpriced iPhones.

If you want to be sustainable and environmentally friendly, why are you replacing the equipment that monitors your cameras? Keep the PC you bought for the cameras, with the Flash version running at the time, and you can leave them going for ever. Adobe hasn't stopped Flash working, and they...

You want Adobe to continue supporting something you bought seven years ago and wasn't even made by them? Technology moves on. Flash is obsolete. Your cameras must be getting that way too.

In addition to the usual PIR controlled floodlights at the back of the house, we have another outside PIR connected to a bell that rings for 10 seconds. The bell is mounted in the conservatory where it can be heard clearly both indoors and outdoors. A potential burglar will know that they have...

Exactly as securiam says. I installed a system with 8 cameras, but I had to specify a 16 camera NVR to use all the cameras at full speed, even with compression.

And drill through a mortar course rather than a brick. It can be repaired without trace if the cable is no longer needed.

Just a hint re your Virgin installation. Since there has previously been a Virgin connection, when you sign up they will send you a self-install kit to connect to the existing broadband point. If you would prefer to have the router somewhere else, insist on an engineer installation so you can...

The router only has one active phone socket, so you would need an adaptor for the alarm and the phone. You must make sure that your alarm signalling is compatible with a VOIP line. This is becoming a general issue now as all phone services are switching over to VOIP. I believe that the alarm...

New connections on Virgin no longer use the separate phone line. They use VOIP with a phone connection to the router. Check the other post about Virgin, just below this.

Your phone now comes from the Hub, not the V6 box. But the principle is the same. The separate phone connection will be dead and you can cut it back without any harm.

You'll need to consider how you will select which camera/s to display on the TV and the monitor. Can your DVR send individual channel streams to the two displays over ethernet? If not you will need monitors that can run suitable software.