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Not really there is no "film" its just the bonds of hydrogen are stiff and these are evenly distributed through the water column, at its boundary there is no other free hydrogen to link with so the surface links with each other and the rest of the mass of hydrogen in the water hence we get...

Welcome to the world of standards and conformity, if a foreign standard is as good as ours what makes it any more inherently dangerous or safer than ours - absolutely nothing... if the manufacturer says its good to go, it is. and to close the loop what makes that wooden light fitting...

None just the same way our certificates of conformity rpovide little in the way of reassurance, you do understand that we got rid of type testing some 17 years ago and now rely on manufactures to ensure that their products conform so the only issue is one of trust and unless we start wholesale...

You seemed to have missed Brexit... when we copied all those foreign standards directly onto our statute book wholesale in an afternoon.... and we carry on doing so , so we can trade with the rest of the world... there is no such thing as a British standard in reality its just a made up thing to...

get off that tiny horse and go a play with you German standard DIN rail

We already do have have done for just over 170 years... what on earth do you think happens when you are extradited for a crime in a different nation ? We are dealing with products not a legal system, products can be tested, legality is a matter of opinion. And don't twist my words I said...

I am not suggesting it, its whats been done....

No we are just agreeing that their standards are as good as ours.... what on earth makes you think ours are any better than somebody else's.

yep easily the issue, new hobs chuck out a fair bit of leakage, and current testing is all on the will fail at one times mA but of course it can fail much earlier at lower mA and still pass the 1x test.

You have to wonder how all those retro standard and desk lamps are sold in the UK that predate the double square. By the way any relevant marks do not need to be on the product itself but can be on the packaging if the original standard which meets conformity in the country of origin is on...

You will not be retaining muck in the way of soil just a 45 degree line from the bottom of the wall. given our summer you will find that a clay soil will suffer no or little slip. I would just dig the whole thing out then build the wall, a man with a digger and a muck away truck will get that...

How are all those reform councils getting on... have they waved the magic wand yet or just employing management consultants at a historic rate to cover up their ineptitude? How has reform got on with a migration policy , not seen one nor has anybody else for that matter but reform has been...

The retaining wall is for you garden, not for the house, gravity only works in one direction straight down, the retaining wall will support the mass of earth behind it in a 45 degree angle ( soil type dependant). eg. none of these have fallen down the slope.... number 20 used to be my house and...

You might want to check the application of that... its designed for new roof construction, in-situ roofs are normally dealt with on a best endeavours route with the BCO..as older roofs rarely have membrane or sarking or felt that conform to the rest of the spec... making the guidance either...

err what his boiler fires up goes for 2 minutes then shuts down and he bled the rad how would he bleed the rad without water ?.. the absolute classic sign of a stuck valve which he himself can check in two minutes, look at the position of the flag / lever, call for heat, does it move...

You have two options. War or cold roof. 1. Go with a vaulted ceiling - remove the insulation, fit 100mm of PIR board between the joists allowing for 50mm air gap between top of board and roof then vapour barrier ( polythene sheet) the either insulated PB or 25mm PIR + Plaster Board. - you can...

This is what god invented plasterboard for... to provide 30min fire protection when fixed using mechanical fixings ie screws.

check that the little metal flag on the motorised valves actually move when you call for heating ie turn up the thermostat...

probably best to read and then actually quote the regs rather than going off on some fairy trail to Narnia. 7.4.1 Band I circuits must not be contained within the same wiring system as Band II circuits unless (a) every cable is insulated for the highest voltage present. There it ends as data...

TRV work by pressing down on a plunger valve - that's the bit sticking up from the middle the metal valve body. They do not require much force to open, a spring keeps the valve shut untill the TRV head expands and forces the plunger down... so as to leaks it won't leak anymore than it is - see...