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If I may chime in as a punter, I think that people who contract with trades professionals need to wise up a little but it's only through experience that you wise up. We had an extension built and left it to the builder to arrange all the professional trades as part of the build - mistake...

One final post script on this subject which may be of some use to both diy'ers and pro's alike. I now know the reason why our three rads were 'dead' - the NR valve, however, I recall when our house was extended the plumber had to move the boiler to a new position and in doing so reversed the...

Have just run anoither check - no heat coming back up the CH return - must've been residual heat from test the CH. As a matter of interest the NR valve was on the flow side and I am sure it was there because of a second pump per chrishutt. It has taken three years to sort this out. The old...

As a matter of interest should the nr valve be on the flow or return?

Post script - Remoed the non-return valve and replaced with a 22mm straight connector - bingo - the three dead rads are now glowing. No adverse effects I believe - just one comment - is it usual to have a little heat radiating back from the emersion along the return pipe of the CH when only...

Chris - not sure how to post a pic, however, the more I think about it it's probably as a result of the second (now removed) pump. We have had the house extended and the NR valve is on the side of the old part of the house separating the house from the now removed conservatory. I think...

Thanks Dave. This is a fully pumped system, used to be gravity.

I wonder if any of you can advise why my CH system would have a non-return valve within it? For some time now three radiators ahve not been heating at all and I decided to investigate today as we are about to have some decorating done. (Usually I do these things int he middle of winter and...

Tks pensdown, there will be an elbow in the cabling going from above work surface to below for a fused connection to hob ignition. The clearance behind base units is tight.

May have another solution and would appreciate your advice. Is it allowable to place cable within surface mounted trunking but with the trunking flush with the wall i.e. sunk into it. (The trunking I am thinking of has clip on capping). Obviously this would not be plastered over.

Thanks Adam - good point.

Tks Plugwash

May seem a bit of an odd question but here goes - is it allowable to run a cable through a knock out box - i.e. not actually connected to an outlet (although the outlet will be connected to a separate cable)? Ultimately the two cables will be part of the same circuit, it's just that the routing...

looking at your examples it may be questionable if cable routing complies. Cabling has been in place for over eight years and I am now concerned that for a short run in the cavity - (2 inches) the cable runs from a vertical, diagonally into the socket box. I believe the deptht of the cavity is...

No sign of any damages to the cable. One other point, we may well have to have an additional ring goign behind the cooker cable. Bit of a cross roads here but I can't see any other way, bit of a horlicks really. Thanks as usual for all your advice.

Thanks Andy. I'll leave it alone then.

Redecorating kitchen tiling in particular small part of false wall which houses h/c water pipes and some cables - ring main and oven radial. Took off the false wall panel and noticed oven radial passes around the cold water pipe within the void. Should the pipe be insulated in any way? I...

Do LED's count as low energy? I understand there are some on the market brightness of 50w drawing only 1.2w or is that cods?

Have had a yale wirefree for 4 years. Absolutely no problems with it.

Does anyone knwo the maximum outlet hose length allowable on a dishwasher. It is going into a trap not stand-pipe. Thanks