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Hi, Trying to get my head around RCBO's in a CU, and the different types. I am looking at Wylex gear, what is the difference between a standard height RCBO and a 'miniature RCBO', apart from obviously the height. Thanks

Domestic premises do not have official escape routes. A domestic dwelling configured as an HMO will have 'protected escape routes', with emergency lighting, signage and a 'final exit door'. FRA was a privately paid consultant. Is timber in walls not usually covered by a layers of fire...

Stairs ? one fo the CU's will be near to a staircase ... and part of the esacape route. FRA - so he does not have any jurisdiction over the electrical installation ? passing the glow wire test I remember when Polystyrene was a novel product, people glued it to ceilings, and cut shapes out of...

Thank you for the reply. Enclosing CUs etc. in wooden cabinets is common. That was my impression of matters. I am sure my Fire Risk Assesor has mentioned that where timber is used in such a manner to enclose, it should be fire rated, I will go back and ask.

Thank you for the replies, the question was more about the location, and boxing in of a CU, rather than the CU's construction itself. The Location is by the entrance door to a flat, which is a protected escape route, the CU will sit on a 60 minute Fire Separating wall adjacent. "You can build...

Hi, Question relates to a flat conversion. Does a metal cased CU on a 60 minute fire resisting separating wall need to be installed inside a certificated fire proof enclosure, or can it be enclosed in a hand made cabinet made of Fire Rated ply or MDF. Similar question for the main DNO's...

I will plumb in the UFH and get it working, and buy a thermal imaging camera, hopefully that will help me see where the pipes are. I did wonder about the lagging, why did they not use foam lagging - these pipes sit ontop of the un-insulated slab, the heat loss ! I was paying for materials and...

Yes they did, it all appeared in one afternoon after I made a loose suggestion the boiler room might be in an outhouse. Under the screed would have run the feed to the UFH, CHF & CHR, HW and Secondary Circuit - all full of hot water, that would make for a hot floor, regardless of the UFH. The...

Agree wish I'd taken pictures before the screed went down, was all a bit rushed - with a wheel barrow race at the end. Not doing it means a 5 mt dead leg on both hot and cold water supply to a bathroom (unless I replumb and box in on the surface), it will also mean a 6mt run of CH hot pipes...

Managed to find a leaflet by the final exit door of my local Wickes ... titled 'Project No. 53 - UFH Repair work'. Its got their name on it. Here's some pictures of the pipes I wish to gain access too, under the screed, before the butchery commences:

I have UFH in a 65/75mm screed, this sits ontop of 75mm PIR. Running through the 75mm PIR (in cut channels) are 22mm copper pipes - which I need to gain access to. I don't want to create a nightmare, am hoping nimble use of an angle grinder will alllow me to slice up the screed into thin...

Thanks for the suggestion, yes thought if cutting something down, seems only option so far.

Thanks. We have made separate calculations for the radiators, so work now is to calculate heat loss for the boiler. We have given up on the Stelrad STARS, after day and half of persisting, it loses windows and doors, is fiddly and finicky, then when you get there the browser tab crashes and...

Hi, I have a 1930's semi with cast iron airbrick vents, have googled suppliers, but everyone sells 9" wide vents, I need a 6" (or 150mm). Any brickies come across this, and know where one might be sold. We could chisel out a wider gap and put in a 9"er, just concerned the slate DPC will get...

Thanks The down side of a system boiler is that the pump and valve gear may not match the heating requirements of the house. That needs to be checked before spec'ing. unventeds tend to have high kW calorifiers and the re-heat times are quick Looking at a Megaflow Eco Solar PV Indirect (Can't...

Thanks Why such a large cylinder There will be 4 showers in the property. A heat only would be more sensible. Confused, could you explain why a heat only would be better than a system boiler for an unvented tank. My understanding is that a system boiler will have pumps and valves pre-installed...

I am looking to purchase a System Boiler to heat an unvented cylinder 200-300 litres, and heat a 5/6 bed property. Is there a simple metric to help size the boiler, ie kw/p radiator, and kw p/litre for storage tank. Presume its always better to go over than under power, a good modulation ratio...

An unvented cylinder will be installed in a ground floor cupboard, this level is below the outside level, making a through the wall drain un workable. Running under the floor is a 110mm PVC soil pipe. Would there be any issues putting a Boss Strap on it, and allowing the cylinders 'drain' to...

I flushed out all the pipes out, hopefully all the air was vented out under pressure. Now say 0.1 ml of water leaks; the air will have expanded to 1.1 ml, and the pressure will have dropped to 9 bar.. Trying to envisage what 10ml of air is ... but think I get it ... thanks.

Thanks for the replies. Apologies - should have said Y plan. My question is - will copper compression fittings deal with a 10-15 bar test, I would have thought so, and ... will a tiny weep from any of these fittings result in a noticable drop on the pressure gauge within minutes ?. My normal...